![]() Pathology should be performed if the underlying cause of the glaucoma is suspected to be neoplasia. The optic nerve has little give in a cat, and it is essential that NO pressure be applied on the globe when it is removed, to prevent damage to the optic nerve at the chiasm. Removal of an enlarged cat’s eye can result in the patient waking up blind due to damage to the optic nerve on the fellow eye. Signalment can provide an important clue to the cause of many ophthalmic conditions these clues include conditions that are specific to a particular species (e.g. IT IS RECOMMENDED THAT ENUCLEATION OF AN ENLARGED CAT’S EYE BE PERFORMED BY AN EYE SPECIALIST. If the eye is enlarged and the IOP is not responding to therapy, eye removal is recommended. Medical management can be attempted if the IOP is less than 35mmHg and may be successful and avoid the need for eye removal. Dilute pilocarpine (0. In a normal eye, administration of physostigmine (and pilocarpine, below) causes slow or delayed constriction of the pupil. Once a cat’s eye develops buphthalmos (is enlarged) it is blind. to the normal eye) rapid pupil constriction. Osmotic Agents – Rarely used and can have significant systemic side effects. Prostaglandin antagonists like latanoprost (Xalatan®) are not effective in reducing intraocular pressure but can cause marked constriction of the pupil. These are used twice to three times daily depending on IOP readings. These are the mainstay of glaucoma treatmenet in cats. Topical carbonic anhydrase inhibitors: Dorzolamide (Trusopt®). Treating the uveitis is very important as it is usually the underlying cause. Systemic anti-inflammatory therapy: oral cortisone or NSAID depending on the health of the cat and the individual case. Topical NSAID drops: Diclofenac 0.1% (Voltaren®) is also every effective. Regularly recheck the intraocular pressure and avoid if ulceration in present. The iris is the visible coloured layer seen within the eye. The anterior uvea includes the iris and ciliary body while the choroid comprises the posterior uveal tract. It is usually pigmented and is the vascular layer of the globe. Topical cortisone drops: Prednisolone acetate (Prednefrin Forte®) or Dexamathasone eye drops (Maxidex®) are extremely effective but some studies have shown a percentage of cats developing elevated intraocular pressure with long term use. The uveal tract makes up the middle layer of the globe, and consists of the iris, ciliary body and choroid. The uveitis must be managed as well as the glaucoma. The lens is behind the pupil but is not seen when healthy, as it is clear.Medical management is the principal way of controlling intraocular pressure and maintaining comfort. The pupil is a hole in the center of the iris. The pupils should be the same size and should constrict to a pinpoint when a bright light is shined in the eye. ![]() The pupil is the black spot in the center of the eye. ragged edges, although this can occur with aging and is called iris atrophy.In this disease, the eye with the enlarged pupil is the normal eye and it only looks odd because the other pupil is constricted so much. Another possibility is that Horner's syndrome is occurring. Some, but not all, dogs with blue eyes are deaf. Atropine eye drops will make the pupil enlarge, so checking to be sure that you have the right drops might be a good idea. The iris can be one of several different colors and some dogs have two different colors. Peering through the pupil, you look through the lens, which is clear, and you may see a bright colorful structure, which is the retina. yellow discoloration, indicating jaundice.In health, the conjunctiva should be about the same shade of pink as the gums.Ībnormal findings on the conjunctiva include: If you stretch the lid more, you will see a pink tissue, which is the conjunctiva. yellow discoloration of the sclera, which indicates jaundice.bruises, which may indicate a local injury or a problem with the clotting system Consensual pupillary constriction of the affected eye should still occur when the other eye is stimulated with light.The white part of the eye is the sclera, which is normally glistening white and has small, thin red blood vessels on its surface. To see the parts of the eye beneath the upper eyelid, pull the upper eyelid up with your thumb to open the eye widely.
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