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Conjunctivitis. Conjunctivitis, also known as pink eye, [ 4] is inflammation of the outermost layer of the white part of the eye and the inner surface of the eyelid. [ 5] It makes the eye appear pink or reddish. [ 1] Pain, burning, scratchiness, or itchiness may occur. [ 1] The affected eye may have increased tears or be "stuck shut" in the ...
An epicanthic fold or epicanthus[ 6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye. [ 3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature. [ 7][ 8][ 9] Various factors influence ...
Purkinje images are reflections of objects from the structure of the eye. They are also known as Purkinje reflexes and as Purkinje–Sanson images. At least four Purkinje images are usually visible in the normal eye. The first Purkinje image (P1) is the reflection from the outer surface of the cornea. The second Purkinje image (P2) is the ...
The ocular immune system protects the eye from infection and regulates healing processes following injuries. The interior of the eye lacks lymph vessels but is highly vascularized, and many immune cells reside in the uvea, including mostly macrophages, dendritic cells, and mast cells. [ 1] These cells fight off intraocular infections, and ...
Uvea with 14. Iris, 15. Ciliary body. The anterior segment or anterior cavity[ 1] is the front third of the eye that includes the structures in front of the vitreous humour: the cornea, iris, ciliary body, and lens. [ 2][ 3] Within the anterior segment are two fluid-filled spaces: the anterior chamber between the posterior surface of the cornea ...
Ophthalmology ( / ˌɒfθælˈmɒlədʒi /, OFF-thal-MOL-ə-jee) [ 1] is a clinical and surgical specialty within medicine that deals with the diagnosis and treatment of eye disorders. [ 2] A former term is oculism . An ophthalmologist is a physician who undergoes subspecialty training in medical and surgical eye care. [ 3]
The human eye is a sensory organ in the visual system that reacts to visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and keeping balance . Arizona Eye Model. "A" is accommodation in diopters. The eye can be considered as a living optical device. It is approximately spherical in shape, with its outer ...
The "LEA Numbers Test" was the second of the LEA tests that was developed and can be used to test the visual acuity of older children and even adults. This test has a layout similar to a typical Snellen chart, with lines of numbers decreasing in size towards the bottom of the page. Like the optotypes of the LEA Symbols Test, these numbers are ...
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