Page 1218 - Problem-Based Feline Medicine

1210 PART 15 CAT WITH EYE PROBLEMS

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Trauma:
● Eyelid trauma** (p 1226)
Trauma may result in lacerations, hemorrhage and a mucoid to mucopurulent discharge as the
lesion heals. The wound should be obvious. Healed eyelid wounds may result in cicatricial dis-
tortion of the lids, and trichiasis or ectropian.
WHERE?

CORNEA
DEGENERATIVE
● Corneal sequestrum** (p 1231)
There may be a serous or mucopurulent discharge, with a brown or black stained area on the
cornea. Ulceration and corneal vascularization may or may not be present.
MECHANICAL

● Ulcerative keratitis** (p 1230)
Causes a serous ocular discharge with blepharospasm and photophobia. Corneal cloudiness is pres-
ent, and corneal erosion is evident on close examination, or with fluorescein stain.
INFLAMMATORY/INFECTIOUS
● Herpetic keratitis*** (p 1229)
Early cases seen as dendritic lesions (faint linear changes). Chronic cases develop geographic ker-
atitis (irregular-shaped lesions) associated with superficial ulceration and scarring. All have a
serous ocular discharge. History of prior cat flu with signs consistent with feline herpes virus-1
infection.
Inflammatory/immune-mediated:

● Eosinophilic keratoconjunctivitis* (p 1221)
A mucopurulent discharge with proliferative inflammatory lesion of the cornea and conjunc-
tiva. Associated with allergic conditions.
Trauma:
● Corneal trauma*** (p 1230)
Serous to mucopurulent discharge is commonly seen in corneal injury. Fibrin tags or clots may
be seen attached to the injured area of the cornea. If the cornea has been penetrated, a continuous
clear discharge may be present caused by leakage of aqueous humor. The cat will show severe
ocular pain, guarding the eye, blepharospasm and photophobia.
WHERE?

ORBIT
INFLAMMATORY
● Retrobulbar infection (p 1231)
Retrobulbar infection may result in exophthalmos, and swollen conjunctiva with injected blood
vessels, and a mucopurulent discharge. The third eyelid may be prominent, and there may be pain
on opening the mouth. Rare.