Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Free
Faster access than browser!
 

Eye

Index Eye

Eyes are organs of the visual system. [1]

165 relations: Adaptation (eye), Adobe Flash, Africa, Amphibian, Amphipoda, Angular resolution, Animal, Annelid, Annual Reviews (publisher), Antarctic krill, Aqueous humour, Aragonite, Arthropod, Arthropod eye, Binocular vision, BioScience, Bird of prey, Bivalvia, Black and white, Blind spot (vision), Box jellyfish, Brain, Brittle star, Brownsnout spookfish, Calcite, Cambrian explosion, Camera, Caterpillar, Cell (biology), Cephalopod, Cephalopod eye, Chiton, Chordate, Circadian rhythm, Cnidaria, Color, Color vision, Cone cell, Copepod, Copilia, Cornea, Crayfish, Crustacean, Crystal, Crystallin, Darkness, Decapoda, Degree (angle), Depth perception, Diffraction, ..., Dragonfly, Ed Yong, Emission theory (vision), Entrainment (chronobiology), Eye, Eye chart, Eye color, Eye development, Eye disease, Eye injury, Eye movement, Eyelid, Field of view, Fish, Flatworm, Focus (optics), Fovea centralis, Fresnel lens, Gastropoda, Glyptonotus antarcticus, Guanine, Hagfish, Horse, Human eye, Hydrothermal vent, Hyperiidea, Hyperspectral imaging, Intrinsically photosensitive retinal ganglion cells, Iris (anatomy), Jumping spider, Larva, Lens (anatomy), Light, Limulus, Lobster, Luneburg lens, Mammalian eye, Mantis, Mantis shrimp, Mayfly, Microorganism, Minute and second of arc, Mirror, Mollusc eye, Mollusca, Monocular vision, Monophyly, Mysida, Nature (journal), Nature Reviews Neuroscience, Nervous system, Neuron, Nictitating membrane, Ommatidium, Ophiocoma wendtii, Optic nerve, Optical axis, Optics, Organ (anatomy), Parallel evolution, PAX6, Pecten (bivalve), Peripheral vision, Phased array, Photopic vision, Photoreceptor cell, Photoreceptor protein, Photosensitivity, Phylogenetics, Phylum, Pinhole camera, Pit viper, Polarization (waves), Pontella, Prawn, Pretectal area, Pseudopupil, Pupil, Pupillary light reflex, Rabbit, Ray (optics), Refractive index, Retina, Retinohypothalamic tract, Rhodopsin, Rod cell, Rotifer, Scallop, Scotopic vision, Scutigera, Sensory organs of gastropods, Shrimp, Simple eye in invertebrates, Snail, Snake, Spherical aberration, Springer Science+Business Media, Stimulus (physiology), Stimulus–response model, Strepsiptera, Sunlight, Suprachiasmatic nucleus, Tapetum lucidum, Tears, The Journal of Experimental Biology, The Quarterly Review of Biology, Transparency and translucency, Trilobite, Ultraviolet, Vertebrate, Visual acuity, Visual perception, Visual system, Vitreous body, Zoom lens. Expand index (115 more) »

Adaptation (eye)

In ocular physiology, adaptation is the ability of the eye to adjust to various levels of light.

New!!: Eye and Adaptation (eye) · See more »

Adobe Flash

Adobe Flash is a deprecated multimedia software platform used for production of animations, rich Internet applications, desktop applications, mobile applications, mobile games and embedded web browser video players.

New!!: Eye and Adobe Flash · See more »

Africa

Africa is the world's second largest and second most-populous continent (behind Asia in both categories).

New!!: Eye and Africa · See more »

Amphibian

Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia.

New!!: Eye and Amphibian · See more »

Amphipoda

Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies.

New!!: Eye and Amphipoda · See more »

Angular resolution

Angular resolution or spatial resolution describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution.

New!!: Eye and Angular resolution · See more »

Animal

Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.

New!!: Eye and Animal · See more »

Annelid

The annelids (Annelida, from Latin anellus, "little ring"), also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.

New!!: Eye and Annelid · See more »

Annual Reviews (publisher)

Annual Reviews, located in Palo Alto California, Annual Reviews is a nonprofit publisher dedicated to synthesizing and integrating knowledge for the progress of science and the benefit of society.

New!!: Eye and Annual Reviews (publisher) · See more »

Antarctic krill

Antarctic krill (Euphausia superba) is a species of krill found in the Antarctic waters of the Southern Ocean.

New!!: Eye and Antarctic krill · See more »

Aqueous humour

The aqueous humour is a transparent, watery fluid similar to plasma, but containing low protein concentrations.

New!!: Eye and Aqueous humour · See more »

Aragonite

Aragonite is a carbonate mineral, one of the two most common, naturally occurring, crystal forms of calcium carbonate, CaCO3 (the other forms being the minerals calcite and vaterite).

New!!: Eye and Aragonite · See more »

Arthropod

An arthropod (from Greek ἄρθρον arthron, "joint" and πούς pous, "foot") is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and paired jointed appendages.

New!!: Eye and Arthropod · See more »

Arthropod eye

Apposition eyes are the most common form of eye, and are presumably the ancestral form of compound eye.

New!!: Eye and Arthropod eye · See more »

Binocular vision

In biology, binocular vision is a type of vision in which an animal having two eyes is able to perceive a single three-dimensional image of its surroundings.

New!!: Eye and Binocular vision · See more »

BioScience

BioScience is a monthly peer-reviewed scientific journal that is published by Oxford University Press on behalf of the American Institute of Biological Sciences.

New!!: Eye and BioScience · See more »

Bird of prey

A bird of prey, predatory bird, or raptor is any of several species of bird that hunts and feeds on rodents and other animals.

New!!: Eye and Bird of prey · See more »

Bivalvia

Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts.

New!!: Eye and Bivalvia · See more »

Black and white

Black and white, often abbreviated B/W or B&W, and hyphenated black-and-white when used as an adjective, is any of several monochrome forms in visual arts.

New!!: Eye and Black and white · See more »

Blind spot (vision)

A blind spot, scotoma, is an obscurity of the visual field.

New!!: Eye and Blind spot (vision) · See more »

Box jellyfish

Box jellyfish (class Cubozoa) are cnidarian invertebrates distinguished by their cube-shaped medusae.

New!!: Eye and Box jellyfish · See more »

Brain

The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals.

New!!: Eye and Brain · See more »

Brittle star

Brittle stars or ophiuroids are echinoderms in the class Ophiuroidea closely related to starfish.

New!!: Eye and Brittle star · See more »

Brownsnout spookfish

The brownsnout spookfish (Dolichopteryx longipes) is a species of barreleye in the family Opisthoproctidae.

New!!: Eye and Brownsnout spookfish · See more »

Calcite

Calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (CaCO3).

New!!: Eye and Calcite · See more »

Cambrian explosion

The Cambrian explosion or Cambrian radiation was an event approximately in the Cambrian period when most major animal phyla appeared in the fossil record.

New!!: Eye and Cambrian explosion · See more »

Camera

A camera is an optical instrument for recording or capturing images, which may be stored locally, transmitted to another location, or both.

New!!: Eye and Camera · See more »

Caterpillar

Caterpillars are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths).

New!!: Eye and Caterpillar · See more »

Cell (biology)

The cell (from Latin cella, meaning "small room") is the basic structural, functional, and biological unit of all known living organisms.

New!!: Eye and Cell (biology) · See more »

Cephalopod

A cephalopod is any member of the molluscan class Cephalopoda (Greek plural κεφαλόποδα, kephalópoda; "head-feet") such as a squid, octopus or nautilus.

New!!: Eye and Cephalopod · See more »

Cephalopod eye

Cephalopods, as active marine predators, possess sensory organs specialized for use in aquatic conditions.

New!!: Eye and Cephalopod eye · See more »

Chiton

Chitons are marine molluscs of varying size in the class Polyplacophora, formerly known as Amphineura.

New!!: Eye and Chiton · See more »

Chordate

A chordate is an animal belonging to the phylum Chordata; chordates possess a notochord, a hollow dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail, for at least some period of their life cycle.

New!!: Eye and Chordate · See more »

Circadian rhythm

A circadian rhythm is any biological process that displays an endogenous, entrainable oscillation of about 24 hours.

New!!: Eye and Circadian rhythm · See more »

Cnidaria

Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic (freshwater and marine) environments: they are predominantly marine species.

New!!: Eye and Cnidaria · See more »

Color

Color (American English) or colour (Commonwealth English) is the characteristic of human visual perception described through color categories, with names such as red, orange, yellow, green, blue, or purple.

New!!: Eye and Color · See more »

Color vision

Color vision is the ability of an organism or machine to distinguish objects based on the wavelengths (or frequencies) of the light they reflect, emit, or transmit.

New!!: Eye and Color vision · See more »

Cone cell

Cone cells, or cones, are one of three types of photoreceptor cells in the retina of mammalian eyes (e.g. the human eye).

New!!: Eye and Cone cell · See more »

Copepod

Copepods (meaning "oar-feet") are a group of small crustaceans found in the sea and nearly every freshwater habitat.

New!!: Eye and Copepod · See more »

Copilia

Copilia is a genus of copepods in the family Sapphirinidae.

New!!: Eye and Copilia · See more »

Cornea

The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber.

New!!: Eye and Cornea · See more »

Crayfish

Crayfish, also known as crawfish, crawdads, crawldads, freshwater lobsters, mountain lobsters, mudbugs or yabbies, are freshwater crustaceans resembling small lobsters, to which they are related; taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea.

New!!: Eye and Crayfish · See more »

Crustacean

Crustaceans (Crustacea) form a large, diverse arthropod taxon which includes such familiar animals as crabs, lobsters, crayfish, shrimp, krill, woodlice, and barnacles.

New!!: Eye and Crustacean · See more »

Crystal

A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

New!!: Eye and Crystal · See more »

Crystallin

In anatomy, a crystallin is a water-soluble structural protein found in the lens and the cornea of the eye accounting for the transparency of the structure.

New!!: Eye and Crystallin · See more »

Darkness

Darkness, the polar opposite to brightness, is understood as a lack of illumination or an absence of visible light.

New!!: Eye and Darkness · See more »

Decapoda

The Decapoda or decapods (literally "ten-footed") are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crayfish, crabs, lobsters, prawns, and shrimp.

New!!: Eye and Decapoda · See more »

Degree (angle)

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees.

New!!: Eye and Degree (angle) · See more »

Depth perception

Depth perception is the visual ability to perceive the world in three dimensions (3D) and the distance of an object.

New!!: Eye and Depth perception · See more »

Diffraction

--> Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit.

New!!: Eye and Diffraction · See more »

Dragonfly

A dragonfly is an insect belonging to the order Odonata, infraorder Anisoptera (from Greek ἄνισος anisos, "uneven" and πτερόν pteron, "wing", because the hindwing is broader than the forewing).

New!!: Eye and Dragonfly · See more »

Ed Yong

Edmund Soon-Weng Yong (born 1981), commonly known as Ed Yong, is a British science journalist.

New!!: Eye and Ed Yong · See more »

Emission theory (vision)

Emission theory or extramission theory (variants: extromission, extromittism) is the proposal that visual perception is accomplished by eye beams emitted by the eyes.

New!!: Eye and Emission theory (vision) · See more »

Entrainment (chronobiology)

Entrainment, within the study of chronobiology, occurs when rhythmic physiological or behavioral events match their period to that of an environmental oscillation.

New!!: Eye and Entrainment (chronobiology) · See more »

Eye

Eyes are organs of the visual system.

New!!: Eye and Eye · See more »

Eye chart

An eye chart is a chart used to measure visual acuity.

New!!: Eye and Eye chart · See more »

Eye color

Eye color is a polygenic phenotypic character determined by two distinct factors: the pigmentation of the eye's iris and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris.

New!!: Eye and Eye color · See more »

Eye development

Eye formation in the human embryo begins at approximately three weeks into embryonic development and continues through the tenth week.

New!!: Eye and Eye development · See more »

Eye disease

This is a partial list of human eye diseases and disorders.

New!!: Eye and Eye disease · See more »

Eye injury

Physical or chemical injuries of the eye can be a serious threat to vision if not treated appropriately and in a timely fashion.

New!!: Eye and Eye injury · See more »

Eye movement

Eye movement includes the voluntary or involuntary movement of the eyes, helping in acquiring, fixating and tracking visual stimuli.

New!!: Eye and Eye movement · See more »

Eyelid

An eyelid is a thin fold of skin that covers and protects the human eye.

New!!: Eye and Eyelid · See more »

Field of view

The field of view is the extent of the observable world that is seen at any given moment.

New!!: Eye and Field of view · See more »

Fish

Fish are gill-bearing aquatic craniate animals that lack limbs with digits.

New!!: Eye and Fish · See more »

Flatworm

The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning "worm") are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.

New!!: Eye and Flatworm · See more »

Focus (optics)

In geometrical optics, a focus, also called an image point, is the point where light rays originating from a point on the object converge.

New!!: Eye and Focus (optics) · See more »

Fovea centralis

The fovea centralis is a small, central pit composed of closely packed cones in the eye.

New!!: Eye and Fovea centralis · See more »

Fresnel lens

A Fresnel lens is a type of compact lens originally developed by French physicist Augustin-Jean Fresnel for lighthouses.

New!!: Eye and Fresnel lens · See more »

Gastropoda

The gastropods, more commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca, called Gastropoda.

New!!: Eye and Gastropoda · See more »

Glyptonotus antarcticus

Glyptonotus antarcticus is a benthic marine isopod crustacean in the suborder Valvifera.

New!!: Eye and Glyptonotus antarcticus · See more »

Guanine

Guanine (or G, Gua) is one of the four main nucleobases found in the nucleic acids DNA and RNA, the others being adenine, cytosine, and thymine (uracil in RNA).

New!!: Eye and Guanine · See more »

Hagfish

Hagfish, the class '''Myxini''' (also known as Hyperotreti), are eel-shaped, slime-producing marine fish (occasionally called slime eels).

New!!: Eye and Hagfish · See more »

Horse

The horse (Equus ferus caballus) is one of two extant subspecies of ''Equus ferus''.

New!!: Eye and Horse · See more »

Human eye

The human eye is an organ which reacts to light and pressure.

New!!: Eye and Human eye · See more »

Hydrothermal vent

A hydrothermal vent is a fissure in a planet's surface from which geothermally heated water issues.

New!!: Eye and Hydrothermal vent · See more »

Hyperiidea

The Hyperiidea are a suborder of amphipods, small aquatic crustaceans.

New!!: Eye and Hyperiidea · See more »

Hyperspectral imaging

Hyperspectral imaging, like other spectral imaging, collects and processes information from across the electromagnetic spectrum.

New!!: Eye and Hyperspectral imaging · See more »

Intrinsically photosensitive retinal ganglion cells

Intrinsically photosensitive retinal ganglion cells (ipRGCs), also called photosensitive retinal ganglion cells (pRGC), or melanopsin-containing retinal ganglion cells (mRGCs), are a type of neuron in the retina of the mammalian eye.

New!!: Eye and Intrinsically photosensitive retinal ganglion cells · See more »

Iris (anatomy)

In humans and most mammals and birds, the iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina.

New!!: Eye and Iris (anatomy) · See more »

Jumping spider

Jumping spiders are a group of spiders that constitute the family Salticidae.

New!!: Eye and Jumping spider · See more »

Larva

A larva (plural: larvae) is a distinct juvenile form many animals undergo before metamorphosis into adults.

New!!: Eye and Larva · See more »

Lens (anatomy)

The lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina.

New!!: Eye and Lens (anatomy) · See more »

Light

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.

New!!: Eye and Light · See more »

Limulus

Limulus is a genus of horseshoe crab, with one extant species, the Atlantic horseshoe crab (Limulus polyphemus).

New!!: Eye and Limulus · See more »

Lobster

Lobsters comprise a family (Nephropidae, sometimes also Homaridae) of large marine crustaceans.

New!!: Eye and Lobster · See more »

Luneburg lens

A Luneburg lens (originally Lüneburg lens, often incorrectly spelled Luneberg lens) is a spherically symmetric gradient-index lens.

New!!: Eye and Luneburg lens · See more »

Mammalian eye

Mammals normally have a pair of eyes.

New!!: Eye and Mammalian eye · See more »

Mantis

Mantises are an order (Mantodea) of insects that contains over 2,400 species in about 430 genera in 15 families.

New!!: Eye and Mantis · See more »

Mantis shrimp

Mantis shrimps, or stomatopods, are marine crustaceans of the order Stomatopoda.

New!!: Eye and Mantis shrimp · See more »

Mayfly

Mayflies (also known as Canadian soldiers in the United States, and as shadflies or fishflies in Canada and the upper Midwestern U.S.; also up-winged flies in the United Kingdom) are aquatic insects belonging to the order Ephemeroptera.

New!!: Eye and Mayfly · See more »

Microorganism

A microorganism, or microbe, is a microscopic organism, which may exist in its single-celled form or in a colony of cells. The possible existence of unseen microbial life was suspected from ancient times, such as in Jain scriptures from 6th century BC India and the 1st century BC book On Agriculture by Marcus Terentius Varro. Microbiology, the scientific study of microorganisms, began with their observation under the microscope in the 1670s by Antonie van Leeuwenhoek. In the 1850s, Louis Pasteur found that microorganisms caused food spoilage, debunking the theory of spontaneous generation. In the 1880s Robert Koch discovered that microorganisms caused the diseases tuberculosis, cholera and anthrax. Microorganisms include all unicellular organisms and so are extremely diverse. Of the three domains of life identified by Carl Woese, all of the Archaea and Bacteria are microorganisms. These were previously grouped together in the two domain system as Prokaryotes, the other being the eukaryotes. The third domain Eukaryota includes all multicellular organisms and many unicellular protists and protozoans. Some protists are related to animals and some to green plants. Many of the multicellular organisms are microscopic, namely micro-animals, some fungi and some algae, but these are not discussed here. They live in almost every habitat from the poles to the equator, deserts, geysers, rocks and the deep sea. Some are adapted to extremes such as very hot or very cold conditions, others to high pressure and a few such as Deinococcus radiodurans to high radiation environments. Microorganisms also make up the microbiota found in and on all multicellular organisms. A December 2017 report stated that 3.45 billion year old Australian rocks once contained microorganisms, the earliest direct evidence of life on Earth. Microbes are important in human culture and health in many ways, serving to ferment foods, treat sewage, produce fuel, enzymes and other bioactive compounds. They are essential tools in biology as model organisms and have been put to use in biological warfare and bioterrorism. They are a vital component of fertile soils. In the human body microorganisms make up the human microbiota including the essential gut flora. They are the pathogens responsible for many infectious diseases and as such are the target of hygiene measures.

New!!: Eye and Microorganism · See more »

Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.

New!!: Eye and Minute and second of arc · See more »

Mirror

A mirror is an object that reflects light in such a way that, for incident light in some range of wavelengths, the reflected light preserves many or most of the detailed physical characteristics of the original light, called specular reflection.

New!!: Eye and Mirror · See more »

Mollusc eye

The molluscs have the widest variety of eye morphologies of any phylum, and a large degree of variation in their function.

New!!: Eye and Mollusc eye · See more »

Mollusca

Mollusca is a large phylum of invertebrate animals whose members are known as molluscs or mollusksThe formerly dominant spelling mollusk is still used in the U.S. — see the reasons given in Gary Rosenberg's.

New!!: Eye and Mollusca · See more »

Monocular vision

Monocular vision is vision in which both eyes are used separately.

New!!: Eye and Monocular vision · See more »

Monophyly

In cladistics, a monophyletic group, or clade, is a group of organisms that consists of all the descendants of a common ancestor.

New!!: Eye and Monophyly · See more »

Mysida

Mysida is an order of small, shrimp-like crustaceans in the malacostracan superorder Peracarida.

New!!: Eye and Mysida · See more »

Nature (journal)

Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.

New!!: Eye and Nature (journal) · See more »

Nature Reviews Neuroscience

Nature Reviews Neuroscience is a leading review journal with one of the highest impact factors covering neuroscience, in particular.

New!!: Eye and Nature Reviews Neuroscience · See more »

Nervous system

The nervous system is the part of an animal that coordinates its actions by transmitting signals to and from different parts of its body.

New!!: Eye and Nervous system · See more »

Neuron

A neuron, also known as a neurone (British spelling) and nerve cell, is an electrically excitable cell that receives, processes, and transmits information through electrical and chemical signals.

New!!: Eye and Neuron · See more »

Nictitating membrane

The nictitating membrane (from Latin nictare, to blink) is a transparent or translucent third eyelid present in some animals that can be drawn across the eye from the medial canthus for protection and to moisten it while maintaining vision.

New!!: Eye and Nictitating membrane · See more »

Ommatidium

The compound eyes of arthropods like insects, crustaceans and millipedes are composed of units called ommatidia (singular: ommatidium).

New!!: Eye and Ommatidium · See more »

Ophiocoma wendtii

Ophiocoma wendtii is a species of brittle stars that inhabits coral reefs from Bermuda to Brazil.

New!!: Eye and Ophiocoma wendtii · See more »

Optic nerve

The optic nerve, also known as cranial nerve II, is a paired nerve that transmits visual information from the retina to the brain.

New!!: Eye and Optic nerve · See more »

Optical axis

An optical axis is a line along which there is some degree of rotational symmetry in an optical system such as a camera lens or microscope.

New!!: Eye and Optical axis · See more »

Optics

Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it.

New!!: Eye and Optics · See more »

Organ (anatomy)

Organs are collections of tissues with similar functions.

New!!: Eye and Organ (anatomy) · See more »

Parallel evolution

Parallel evolution is the development of a similar trait in related, but distinct, species descending from the same ancestor, but from different clades.

New!!: Eye and Parallel evolution · See more »

PAX6

Paired box protein Pax-6, also known as aniridia type II protein (AN2) or oculorhombin, is a protein that in humans is encoded by the PAX6 gene.

New!!: Eye and PAX6 · See more »

Pecten (bivalve)

Pecten is a genus of large scallops or saltwater clams, marine bivalve mollusks in the family Pectinidae, the scallops.

New!!: Eye and Pecten (bivalve) · See more »

Peripheral vision

Peripheral vision is a part of vision that occurs only on the side gaze.

New!!: Eye and Peripheral vision · See more »

Phased array

In antenna theory, a phased array usually means an electronically scanned array; a computer-controlled array of antennas which creates a beam of radio waves which can be electronically steered to point in different directions, without moving the antennas.

New!!: Eye and Phased array · See more »

Photopic vision

Photopic vision is the vision of the eye under well-lit conditions (luminance level 10 to 108 cd/m2).

New!!: Eye and Photopic vision · See more »

Photoreceptor cell

A photoreceptor cell is a specialized type of neuroepithelial cell found in the retina that is capable of visual phototransduction.

New!!: Eye and Photoreceptor cell · See more »

Photoreceptor protein

Photoreceptor proteins are light-sensitive proteins involved in the sensing and response to light in a variety of organisms.

New!!: Eye and Photoreceptor protein · See more »

Photosensitivity

Photosensitivity is the amount to which an object reacts upon receiving photons, especially visible light.

New!!: Eye and Photosensitivity · See more »

Phylogenetics

In biology, phylogenetics (Greek: φυλή, φῦλον – phylé, phylon.

New!!: Eye and Phylogenetics · See more »

Phylum

In biology, a phylum (plural: phyla) is a level of classification or taxonomic rank below Kingdom and above Class.

New!!: Eye and Phylum · See more »

Pinhole camera

A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole – effectively a light-proof box with a small hole in one side.

New!!: Eye and Pinhole camera · See more »

Pit viper

The Crotalinae, commonly known as pit vipers,Mehrtens JM.

New!!: Eye and Pit viper · See more »

Polarization (waves)

Polarization (also polarisation) is a property applying to transverse waves that specifies the geometrical orientation of the oscillations.

New!!: Eye and Polarization (waves) · See more »

Pontella

Pontella is a marine copepod genus in the family Pontellidae.

New!!: Eye and Pontella · See more »

Prawn

Prawn is a common name for small aquatic crustaceans with an exoskeleton and ten legs (i.e. a member of the order decapoda), some of which can be eaten.

New!!: Eye and Prawn · See more »

Pretectal area

The pretectal area, or pretectum, is a midbrain structure composed of seven nuclei and comprises part of the subcortical visual system.

New!!: Eye and Pretectal area · See more »

Pseudopupil

In the compound eye of invertebrates such as insects and crustaceans, the pseudopupil appears as a dark spot which moves across the eye as the animal is rotated.

New!!: Eye and Pseudopupil · See more »

Pupil

The pupil is a hole located in the center of the iris of the eye that allows light to strike the retina.

New!!: Eye and Pupil · See more »

Pupillary light reflex

The pupillary light reflex (PLR) or photopupillary reflex is a reflex that controls the diameter of the pupil, in response to the intensity (luminance) of light that falls on the retinal ganglion cells of the retina in the back of the eye, thereby assisting in adaptation to various levels of lightness/darkness.

New!!: Eye and Pupillary light reflex · See more »

Rabbit

Rabbits are small mammals in the family Leporidae of the order Lagomorpha (along with the hare and the pika).

New!!: Eye and Rabbit · See more »

Ray (optics)

In optics a ray is an idealized model of light, obtained by choosing a line that is perpendicular to the wavefronts of the actual light, and that points in the direction of energy flow.

New!!: Eye and Ray (optics) · See more »

Refractive index

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how light propagates through that medium.

New!!: Eye and Refractive index · See more »

Retina

The retina is the innermost, light-sensitive "coat", or layer, of shell tissue of the eye of most vertebrates and some molluscs.

New!!: Eye and Retina · See more »

Retinohypothalamic tract

The retinohypothalamic tract (RHT) is a photic neural input pathway involved in the circadian rhythms of mammals.

New!!: Eye and Retinohypothalamic tract · See more »

Rhodopsin

Rhodopsin (also known as visual purple) is a light-sensitive receptor protein involved in visual phototransduction.

New!!: Eye and Rhodopsin · See more »

Rod cell

Rod cells are photoreceptor cells in the retina of the eye that can function in less intense light than the other type of visual photoreceptor, cone cells.

New!!: Eye and Rod cell · See more »

Rotifer

The rotifers (Rotifera, commonly called wheel animals) make up a phylum of microscopic and near-microscopic pseudocoelomate animals.

New!!: Eye and Rotifer · See more »

Scallop

Scallop is a common name that is primarily applied to any one of numerous species of saltwater clams or marine bivalve mollusks in the taxonomic family Pectinidae, the scallops.

New!!: Eye and Scallop · See more »

Scotopic vision

Scotopic vision is the vision of the eye under low-light levels.

New!!: Eye and Scotopic vision · See more »

Scutigera

Scutigera is a centipede genus in the family Scutigeridae.

New!!: Eye and Scutigera · See more »

Sensory organs of gastropods

The sensory organs of gastropods (snails and slugs) include olfactory organs, eyes, statocysts and mechanoreceptors.

New!!: Eye and Sensory organs of gastropods · See more »

Shrimp

The term shrimp is used to refer to some decapod crustaceans, although the exact animals covered can vary.

New!!: Eye and Shrimp · See more »

Simple eye in invertebrates

A simple eye (sometimes called a pigment pit) refers to a type of eye form or optical arrangement that contains a single lens.

New!!: Eye and Simple eye in invertebrates · See more »

Snail

Snail is a common name loosely applied to shelled gastropods.

New!!: Eye and Snail · See more »

Snake

Snakes are elongated, legless, carnivorous reptiles of the suborder Serpentes.

New!!: Eye and Snake · See more »

Spherical aberration

Spherical aberration is an optical effect observed in an optical device (lens, mirror, etc.) that occurs due to the increased refraction of light rays when they strike a lens or a reflection of light rays when they strike a mirror near its edge, in comparison with those that strike close to the centre.

New!!: Eye and Spherical aberration · See more »

Springer Science+Business Media

Springer Science+Business Media or Springer, part of Springer Nature since 2015, is a global publishing company that publishes books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing.

New!!: Eye and Springer Science+Business Media · See more »

Stimulus (physiology)

In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment.

New!!: Eye and Stimulus (physiology) · See more »

Stimulus–response model

The stimulus–response model is a characterization of a statistical unit (such as a neuron) as a black box model, predicting a quantitative response to a quantitative stimulus, for example one administered by a researcher.

New!!: Eye and Stimulus–response model · See more »

Strepsiptera

The Strepsiptera (translation: "twisted wing"', giving rise to the insects' common name, twisted-wing parasites) are an endopterygote order of insects with nine extant families making up about 600 species.

New!!: Eye and Strepsiptera · See more »

Sunlight

Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light.

New!!: Eye and Sunlight · See more »

Suprachiasmatic nucleus

The suprachiasmatic nucleus or nuclei (SCN) is a tiny region of the brain in the hypothalamus, situated directly above the optic chiasm.

New!!: Eye and Suprachiasmatic nucleus · See more »

Tapetum lucidum

The tapetum lucidum (Latin: "bright tapestry; coverlet", plural tapeta lucida) is a layer of tissue in the eye of many vertebrates.

New!!: Eye and Tapetum lucidum · See more »

Tears

Tearing, lacrimation, or lachrymation is the secretion of tears, which often serves to clean and lubricate the eyes in response to an irritation of the eyes.

New!!: Eye and Tears · See more »

The Journal of Experimental Biology

The Journal of Experimental Biology is a peer-reviewed scientific journal in the field of comparative physiology and integrative biology.

New!!: Eye and The Journal of Experimental Biology · See more »

The Quarterly Review of Biology

The Quarterly Review of Biology is a peer reviewed scientific journal covering all aspects of biology.

New!!: Eye and The Quarterly Review of Biology · See more »

Transparency and translucency

In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without being scattered.

New!!: Eye and Transparency and translucency · See more »

Trilobite

Trilobites (meaning "three lobes") are a fossil group of extinct marine arachnomorph arthropods that form the class Trilobita.

New!!: Eye and Trilobite · See more »

Ultraviolet

Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.

New!!: Eye and Ultraviolet · See more »

Vertebrate

Vertebrates comprise all species of animals within the subphylum Vertebrata (chordates with backbones).

New!!: Eye and Vertebrate · See more »

Visual acuity

Visual acuity (VA) commonly refers to the clarity of vision.

New!!: Eye and Visual acuity · See more »

Visual perception

Visual perception is the ability to interpret the surrounding environment using light in the visible spectrum reflected by the objects in the environment.

New!!: Eye and Visual perception · See more »

Visual system

The visual system is the part of the central nervous system which gives organisms the ability to process visual detail, as well as enabling the formation of several non-image photo response functions.

New!!: Eye and Visual system · See more »

Vitreous body

The vitreous body is the clear gel that fills the space between the lens and the retina of the eyeball of humans and other vertebrates.

New!!: Eye and Vitreous body · See more »

Zoom lens

A zoom lens is a mechanical assembly of lens elements for which the focal length (and thus angle of view) can be varied, as opposed to a fixed focal length (FFL) lens (see prime lens).

New!!: Eye and Zoom lens · See more »

Redirects here:

Animal eyes, Apposition eye, Camera-type eye, Compound Eye, Compound Eyes, Conjunctival disorders, Cyber-eye, Eye (anatomy), Eye (invertebrate), Eye (vertebrate), Eye ball, Eye balls, Eye membrane, Eyeball, Eyeballs, Eyes, Facet eyes, Fly's eye lens, Ocular, Ocular globe, Oculars, Ommateum, Ommotidium, Pinhole eye, Robotic eye, Schizochroal eye, Simple eye.

References

[1] https://en.wikipedia.org/wiki/Eye

OutgoingIncoming
Hey! We are on Facebook now! »