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A Snellen chart is an eye chart that can be used to measure visual acuity. Snellen charts are named after the Dutch ophthalmologist Herman Snellen who developed the chart in 1862 as a measurement tool for the acuity formula developed by his professor Franciscus Cornelius Donders .
EyeGuide, Inc. is an American computer software and hardware company, located in Lubbock, Texas, United States, that currently designs and sells eye-controlled technologies for research and related markets. Previously, EyeGuide made the EyeGuide Tracker, an affordable and effective eye tracking device compatible for lab use.
The vitreous humour, or vitreous body, is a jelly-like, transparent substance that fills the majority of the eye. It lies within the vitreous chamber behind the lens, and is one of the four optical components of the eye. [8] Thus, floaters follow the rapid motions of the eye, while drifting slowly within the pocket of liquid. [9]
Asteroid hyalosis is a degenerative condition of the eye involving small white opacities in the vitreous humor. [1] It is known to occur in humans, dogs , cats , horses , and chinchillas . [ 2 ] Clinically, these opacities are quite refractile, giving the appearance of stars shining in the night sky—except that ocular asteroids are often ...
The vitreous fluid is not present at birth (the eye being filled with only the gel-like vitreous body), but found after age 4-5, and increases in size thereafter. [ 1 ] Produced by cells in the non-pigmented portion of the ciliary body , the vitreous humour is derived from embryonic mesenchyme cells, which degenerate after birth.
The least common type of glaucoma in dogs is primary open-angle glaucoma (POAG), although this is the most common type that affects humans. [1] In the Beagle, POAG is an inherited autosomal recessive trait. [2] Secondary glaucomas occur when other eye diseases alter the flow of aqueous humor either into or out of the eye.
Corneal ulcers in cats can be caused by trauma, detergent burns, infections, and other eye diseases. One common cause not seen in dogs is infection with feline herpesvirus 1 (FHV-1). FHV-1 causes ulceration by direct infection of the epithelial cells. Lesions appear as round or dendritic (branching) ulcers.
Grapiprant is widely accepted in veterinary medicine due to its specific and targeted approach to pain management in dogs. The serum concentration of grapiprant is increased when used in conjunction with other drugs such as acetaminophen, albendazole, and alitretinoin. [citation needed]