Optho Flashcards
Where is the aqueous tear film layer produced
Lacrimal glad and gland of 3rd eyelid
The meibomian glands produce which lower of the tear films
Lipid portion
- Is defined as increased opacity in the lens
Cataracts
What is the most common cause of cataracts in cats versus dogs
Cats - anterior uveitis
Dogs - diabetes mellitus
What is the treatment for cataracts
Phacoemulsification
Which breeds are predisposed to glaucoma
Purebreds, cocker spaniels, basset hounds, beagles
What is the cause of primary glaucoma
Compromised iridiocorneal angle yang leading to decreased aqeous flow and pressure build up
What can cause secondary glaucoma
Anterior uveitis blocking the iridiocorneal angle, intraocular neoplasia, diabetes
Bupthalomus in the face of glaucoma indicates _
Chronicity
What are clinical signs of glaucoma
Ocular pain, corneal edema, bupthalomus, tapetal hyperreflectivity, corneal fibrosis, mydriasis, lens luxation
What is the goal of treating glaucoma - what can you use
Increase outflow of aqueous humor or decrease production - can use IV mannitol to decrease IOP, topical carbonic anhydrous inhibitor like methazolonide to decrease IOP or topical latonoprost
What is the goal of treating glaucoma - what can you use
Increase outflow of aqueous humor or decrease production - can use IV mannitol to decrease IOP, topical carbonic anhydrous inhibitor like methazolonide to decrease IOP or topical latonoprost
What are clinical signs of anterior uveitis
Rubidiosis iridis (neovascularization of iris), hypopion (white layer on bottom of eye), hyphema, keratin precipitates
Do you worry about KCS with anterior uveitis
No - dues not extend to lacrimal gland
What are clinical signs of chorioretinitis
Poorly defined gray spots in the fundus, hyper reflectivity, retinal hemorrhage
What is aniscoria - what can cause it
One dilated pupil, one constricted pupil - head trauma
Proptosis is common in - breeds and should be treated by
Brachycephalics - treat by replacing globe and temporary tarrshaphy for 3 weeks
What are clinical signs of a retrobulbar abscess
Systemically ill (anorexia, leukocytosis), exophthalmos, acutely paint - can retropulse the eye with minimal resistance
What breeds commonly experience lens luxation - how do you treat
Terriers - if posterior luxation do nothing, if anterior reed immediate removal due to risk of uveitis or glaucoma
TMS, atropine and general anesthetics can all lead to
Kerato conjunctivitis sick
What is the most common cause of KCS
Immune mediated adenitis
How does canine distemper virus affect the eye
Can cause KCS
Cherry eye is used to describe what clinical condition
Prolapsed 3rd eyelid
What is the difference between a uveal cyst and uveal melanoma
Cyst - brown, round circular and free floating ( very smooth circles)
Melanoma - brown, round and circular , non free floating, less smooth shape
What is the most common ocular tumor in dogs
Meibomian gland adenoma - mass attached to outside of eyelid
