Q3 Exam 3 Flashcards
aphakic crescent
lens subluxation sign where you can see the side of the lens
three complications of lens luxation
glaucoma, cataract, corneal edema and ulcer
three most common causes of cataracts in dogs
genetic, DM, retinal degeneration
do blue eyes have melanin? why does it matter?
yes, in the PIE, brown eyes bind drugs longer like atropine
which nerve causes horners syndrome
CN V
what innervates the ciliary muscle
parasympathetic
what is the tissue that forms the blood aqueous barrier?
non-pigmented ciliary epithelium
when does the tapetum lucidum develop in dogs and cats
4 months age
persistent pupillary membranes
should atrophy by 6w, but often still don’t cause problems
uveal cysts
perfectly round masses, benign, can be associated with glaucoma in goldens, american bulldog, great dane
iris atrophy
just due to age really, probably looks a bit like anisocoria, not a big deal
clinical signs of uveitis
rubeosis iridis, iris bombe, aqueous flare and keratic precipitates
melanocytic tumors in eye
most common primary neoplasm, remove eye if painful/glaucoma or locally invasive, choroidal ones benign
iridociliary tumors
pink glob in posterior chamber, unlikely to met, 2nd most common in dogs
ocular lymphosarcoma
not good prognosis, more likely to be bilateral in dogs
uveodermatologic syndrome
akid, husky, shelty, young, bilateral uveitis and glaucoma, depigmentation of skin around nose and mouth
prescribing latanoprost (and other miotics) with glaucoma
MAKE SURE LENS NOT IN ANTERIOR CHAMBER
persistent hyaloid artery
should be gone between 3-8 weeks, normal to have remnants
4 patterns of retinal vasculature
merangiotic (horizontal), holangiotic (whole eye), paurangiotic (very small), anangiotic
causes of optic neuritis
granulomatous meningoencephalitis and canine distemper most common
non-tapetal changes
active = white/gray = edema
chronic = pigment change/loss
