Flashcards in Glaucoma Deck (45)
Which dog breeds are predisposed to glaucoma?
Pure-breds, Cockers, Bassets, Beagels, Samoyeds
What is primary glaucoma?
Iridocorneal angle that becomes compromised during the first few years of life
Decreased outflow of aqueous leads to glaucoma b/c pressure increases in the eye
What causes secondary glaucoma?
Anterior uveitis, neoplasia, diabetes
How does anterior uveitis cause glaucoma?
Inflammatory debris plug iridocorneal angle
What drains the aqueous from the eye?
What is buphthalmos?
Enlargement of the globe
What is corneal edema?
Blue haze over cornea (NOT A CATARACT)
How is the pupil affected by glaucoma?
What fundic changes will you see with glaucoma?
retinal vascular attenuation, tapetal hyperreflectivity
How do you diagnose glaucoma?
How do you treat glaucoma?
IV mannitol, carbonic anhydrase inhibitor, prostaglandin analog
What prostaglandin analog can you use to treat glaucoma?
How does mannitol help treat glaucoma?
Decreases IOP through osmosis
What carbonic anhydrase inhibitors can you use to treat glaucoma?
How do carbonic anhydrase inhibitors help treat glaucoma?
Decrease aqueous production
How soon after one eye develops glaucoma will the other eye develop glaucoma?
Recurrent bouts of what disease in horses can lead to glaucoma?
Equine recurrent uveitis
An enzyme found in the ciliary body that aids in the production of aqueous humor
How is the optic nerve affected by glaucoma?
Loses myelin and will displace posteriorly (looks cupped)
What is the direction of aqueous humor flow?
Ciliary body --> post. chamber --> pupil --> ant. chamber --> iridocorneal angle --> venous drainage
Where does aqueous drain in the horse?
What does optic disc cupping look like?
Dark halo around retina, vessels appear on a different plane
How do you perform a ciliary body ablation?
Usually buphthalmic globes are blind. What are the exceptions?
Puppies, Shar Peis, horses
How do you measure IOP?
What should be measured in every "red eye" with an intact cornea?
What is normal IOP in animals?
What is used to examine the iridocorneal angle?