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Fovea centralis

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The fovea centralis is a small, central pit composed of closely packed cones in the eye. [1]

62 relations: Angle of view, Astronomer, Averted vision, Beta-Carotene, Binocular vision, Birefringence, Bruch's membrane, Carolina Biological Supply Company, Carotenoid, Choroid, Chromatic aberration, Cone cell, Dichroism, Ellipse, Encyclopædia Britannica, Eye movement, Eye movement in reading, Fetus, Focal length, Foveal, Foveal avascular zone, Foveated imaging, Foveola, Fundus photography, Ganglion cell layer, Gaze-contingency paradigm, Haidinger's brush, Hexagon, Human eye, James Clerk Maxwell, Lutein, Macula of retina, Macular degeneration, Minute and second of arc, Nerve, Optic nerve, Optimum HDTV viewing distance, Oxygen, Parafovea, Perifovea, Peripheral vision, Photoreceptor cell, Pixel density, Posterior pole, Postpartum period, Primate, Reading (process), Retina, Retina Display, Retinal correspondence, ..., Retinal ganglion cell, Retinal pigment epithelium, Rod cell, Simian, Stereoscopic acuity, Visual acuity, Visual artifact, Visual cortex, Visual field, Visual perception, Xanthophyll, Zeaxanthin. Expand index (12 more) »

Angle of view

In photography, angle of view (AOV) describes the angular extent of a given scene that is imaged by a camera.

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Astronomer

An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of Earth.

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Averted vision

Averted vision is a technique for viewing faint objects which uses peripheral vision.

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Beta-Carotene

β-Carotene is an organic, strongly colored red-orange pigment abundant in plants and fruits.

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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.

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Birefringence

Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light.

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Bruch's membrane

Bruch's membrane is the innermost layer of the choroid.

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Carolina Biological Supply Company

Carolina Biological Supply Company is a supplier of science and math education materials to teachers, college professors, home-school educators, and professionals in health and science-related fields in the United States.

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Carotenoid

Carotenoids, also called tetraterpenoids, are organic pigments that are produced by plants and algae, as well as several bacteria and fungi.

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Choroid

The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye, containing connective tissues, and lying between the retina and the sclera.

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Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

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Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

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Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

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Christmas traditions

Christmas traditions vary from country to country.

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Chromatic aberration

In optics, chromatic aberration (abbreviated CA; also called chromatic distortion and spherochromatism) is an effect resulting from dispersion in which there is a failure of a lens to focus all colors to the same convergence point.

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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).

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Dichroism

In optics, a dichroic material is either one which causes visible light to be split up into distinct beams of different wavelengths (colours) (not to be confused with dispersion), or one in which light rays having different polarizations are absorbed by different amounts.

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Ellipse

In mathematics, an ellipse is a curve in a plane surrounding two focal points such that the sum of the distances to the two focal points is constant for every point on the curve.

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Encyclopædia Britannica

The Encyclopædia Britannica (Latin for "British Encyclopaedia"), published by Encyclopædia Britannica, Inc., is a general knowledge English-language encyclopaedia.

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Eye movement

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

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Eye movement in reading

Eye movement in reading involves the visual processing of written text.

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Fetus

A fetus is a stage in the prenatal development of viviparous organisms.

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Focal length

The focal length of an optical system is a measure of how strongly the system converges or diverges light.

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Foveal

The foveal system of the human eye is the only part of the retina that permits 100% visual acuity.

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Foveal avascular zone

Within the fovea is a region devoid of retinal vessels known as the foveal avascular zone (FAZ).

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Foveated imaging

16:1 compression. Foveated image with fixation point at Stephen F. Austin statue. Foveated imaging is a digital image processing technique in which the image resolution, or amount of detail, varies across the image according to one or more "fixation points." A fixation point indicates the highest resolution region of the image and corresponds to the center of the eye's retina, the fovea.

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Foveola

The foveola is located within a region called the macula, a yellowish, cone photo receptor filled portion of the human retina.

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Fundus photography

Fundus photography involves capturing a photograph of the back of the eye i.e. fundus.

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Ganglion cell layer

The ganglion cell layer (ganglionic layer) is a layer of the retina that consists of retinal ganglion cells and displaced amacrine cells.

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Gaze-contingency paradigm

The gaze-contingency paradigm is a general term for techniques allowing a computer screen display to change in function depending on where the viewer is looking.

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Haidinger's brush

Haidinger's brush is an entoptic phenomenon first described by Austrian physicist Wilhelm Karl von Haidinger in 1844.

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Hexagon

In geometry, a hexagon (from Greek ἕξ hex, "six" and γωνία, gonía, "corner, angle") is a six-sided polygon or 6-gon.

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Human eye

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

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James Clerk Maxwell

James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish scientist in the field of mathematical physics.

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Lutein

Lutein (Random House Webster's Unabridged Dictionary. from Latin luteus meaning "yellow") is a xanthophyll and one of 600 known naturally occurring carotenoids.

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Macula of retina

The macula or macula lutea is an oval-shaped pigmented area near the center of the retina of the human eye and some other animalian eyes.

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Macular degeneration

Macular degeneration, also known as age-related macular degeneration (AMD or ARMD), is a medical condition which may result in blurred or no vision in the center of the visual field.

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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.

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Nerve

A nerve is an enclosed, cable-like bundle of axons (nerve fibers, the long and slender projections of neurons) in the peripheral nervous system.

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New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

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New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

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New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

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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.

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Optimum HDTV viewing distance

Optimum HDTV viewing distance is the distance that provides the viewer with the optimum immersive visual HDTV experience.

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Oxygen

Oxygen is a chemical element with symbol O and atomic number 8.

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Parafovea

Parafovea or the parafoveal belt is a region in the retina that circumscribes the fovea and is part of the macula lutea.

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Perifovea

Perifovea is a region in the retina that circumscribes the parafovea and fovea and is a part of the macula lutea.

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Peripheral vision

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

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Photoreceptor cell

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

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Pixel density

Pixels per inch (PPI) or pixels per centimeter (PPCM) are measurements of the pixel density (resolution) of an electronic image device, such as a computer monitor or television display, or image digitizing device such as a camera or image scanner.

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Posterior pole

In ophthalmology, the posterior pole is the back of the eye, usually referring to the retina between the optic disc and the macula.

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Postpartum period

A postpartum (or postnatal) period begins immediately after the birth of a child as the mother's body, including hormone levels and uterus size, returns to a non-pregnant state.

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Primate

A primate is a mammal of the order Primates (Latin: "prime, first rank").

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Reading (process)

Reading is a complex "cognitive process" of decoding symbols in order to construct or derive meaning (reading comprehension).

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Retina

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

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Retina Display

Retina Display (marketed by Apple with a lowercase 'D' as Retina display) is a brand name used by Apple for its series of IPS panel and OLED displays that have a higher pixel density than traditional Apple displays.

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Retinal correspondence

Retinal correspondence is the inherent relationship between paired retinal visual cells in the two eyes.

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Retinal ganglion cell

A retinal ganglion cell (RGC) is a type of neuron located near the inner surface (the ganglion cell layer) of the retina of the eye.

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Retinal pigment epithelium

The pigmented layer of retina or retinal pigment epithelium (RPE) is the pigmented cell layer just outside the neurosensory retina that nourishes retinal visual cells, and is firmly attached to the underlying choroid and overlying retinal visual cells.

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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.

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Simian

The simians (infraorder Simiiformes) are monkeys and apes, cladistically including: the New World monkeys or platyrrhines, and the catarrhine clade consisting of the Old World monkeys and apes (including humans).

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Stereoscopic acuity

Stereoscopic acuity, also stereoacuity, is the smallest detectable depth difference that can be seen in binocular vision.

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Visual acuity

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

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Visual artifact

Visual artifacts (also artefacts) are anomalies apparent during visual representation as in digital graphics and other forms of imagery, particularly microscopy.

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Visual cortex

The visual cortex of the brain is a part of the cerebral cortex that processes visual information.

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Visual field

The visual field is the "spatial array of visual sensations available to observation in introspectionist psychological experiments".

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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.

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Xanthophyll

Xanthophylls (originally phylloxanthins) are yellow pigments that occur widely in nature and form one of two major divisions of the carotenoid group; the other division is formed by the carotenes.

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Zeaxanthin

Zeaxanthin is one of the most common carotenoid alcohols found in nature.

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2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

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2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

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Area centralis, Fovea centralis in macula, Foveæ, Maxwell’s spot, Optic fovea.

References

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

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