Human eye seen from the front in its orbit surrounded by the eyelid and eyelashes, showing the anterior segment with the iris (light brown in this individual), pupil, and sclera visible
Details
Identifiers
Latin
oculus (plural: oculi)
Anatomical terminology
[edit on Wikidata]
posterior segment
ora serrata
ciliary muscle
ciliary zonules
Schlemm's canal
pupil
anterior chamber
cornea
iris
lens cortex
lens nucleus
ciliary process
conjunctiva
inferior oblique muscle
inferior rectus muscle
medial rectus muscle
retinal arteries and veins
optic disc
dura mater
central retinal artery
central retinal vein
optic nerve
vorticose vein
bulbar sheath
macula
fovea
sclera
choroid
superior rectus muscle
retina
Mammals normally have a pair of eyes. Although mammalian vision is not so excellent as bird vision, it is at least dichromatic for most of mammalian species, with certain families (such as Hominidae) possessing a trichromatic color perception.
The dimensions of the eyeball vary only 1–2 mm among humans. The vertical axis is 24 mm; the transverse being larger. At birth it is generally 16–17 mm, enlarging to 22.5–23 mm by three years of age. Between then and age 13 the eye attains its mature size. It weighs 7.5 grams and its volume is roughly 6.5 ml. Along a line through the nodal (central) point of the eye is the optic axis, which is slightly five degrees toward the nose from the visual axis (i.e., that going towards the focused point to the fovea).
going towards the focused point to the fovea). The structure of the mammalianeye has a laminar organization that can be divided into three main layers...
photoallergy and phototoxicity. The photosensitive ganglion cells in the mammalianeye are a separate class of light-detecting cells from the photoreceptor...
bonds absorb only in the ultraviolet region and are colorless to the human eye", "Compounds that are blue or green typically do not rely on conjugated double...
field of normal – or relatively well-preserved – vision. Every normal mammalianeye has a scotoma in its field of vision, usually termed its blind spot...
other eye colors. White cats having one blue and one other-colored eye are called "odd-eyed" and may be deaf on the same side as the blue eye. This is...
terrestrial animal group from 66 million years ago to the present. The basic mammalian body type is quadruped, and most mammals use their four extremities for...
An eye is a sensory organ that allows an organism to perceive visual information. It detects light and converts it into electro-chemical impulses in neurons...
they are even covered by a skin membrane. Like other vertebrates, the mammalianeye develops from the anterior brain vesicle and has a rounded shape (eyeball)...
retinal ganglion cells (mRGCs), are a type of neuron in the retina of the mammalianeye. The presence of an additional photoreceptor was first suspected in...
especially in hazy conditions. The eye of a bird most closely resembles that of other reptiles. Unlike the mammalianeye, it is not spherical, and the flatter...
greater divergence of the eye axis than humans, enabling them to rotate their pupils farther in any direction. The divergence of the eye axis of dogs ranges...
build in sophistication until we arrive at the elegant and complex mammalianeye. In making this journey, he points to several creatures whose various...
vulnerable to sighted predators, and where it is advantageous to have a convex eye-spot, which gathers more light than a flat or concave one. Fish vision shows...
circadian entrainment and that a third class of photoreceptor exists in the mammalianeye. Provencio and colleagues then found in 2000 that melanopsin is also...
in vertebrate animals. Retinal is a conjugated chromophore. In the mammalianeye, retinal begins in an 11-cis-retinal configuration, which — upon capturing...
A parietal eye, also known as a third eye or pineal eye, is a part of the epithalamus present in some vertebrates. The eye is located at the top of the...
2007-12-23. Graham, Dustin. "Melanopsin Ganglion Cells: A Bit of Fly in the MammalianEye". Webvision The Organization of the Retina and Visual System. University...
R.; van der Kooy, D. (March 2000). "Retinal stem cells in the adult mammalianeye". Science. 287 (5460): 2032–6. Bibcode:2000Sci...287.2032T. doi:10.1126/science...
the outermost atmosphere of a star Mistakenly to a Cornea, part of a mammalianeye. This article includes a list of related items that share the same name...
Microscope, no less gaudy then do the whole Feathers; for, as to the naked eye 'tis evident that the stem or quill of each Feather in the tail sends out...
near-mammalian therapsids like Thrinaxodon. The Msx2 gene associated with hair follicle maintenance is also linked to the closure of the parietal eye in...
mammalian REM. However, they do exhibit sleep cycles with phases of REM-like electrical activity measurable by EEG. A recent study found periodic eye...
intrinsically photosensitive retinal ganglion cells (ipRGCs) in the mammalianeye which provide input to the circadian rhythm system. October – Huda Zoghbi...
article describes the human visual system, which is representative of mammalian vision, and to a lesser extent the vertebrate visual system. Together...
Lordosis behavior (/lɔːrˈdoʊsɪs/), also known as mammalian lordosis (Greek lordōsis, from lordos "bent backward") or presenting, is the naturally occurring...
to digest lactose with another enzyme. Creationists claim that the mammalianeye is too complex to have evolved, but there are extant species with simpler...
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