10: Eye Conditions Flashcards
OD OS OU
Right, left, both eyes
Conjunctivitis
Inflammation of conjunctiva
Redness
Swelling
Clear yellow or green discharge
Conjunctivitis common in
Cats w upper respiratory infection (URI)
KCS
Keratoconjunctivitis sicca (dry eye)
KCS common in
Dogs. Esp cocker spaniels & bracheosephalic breeds
Signs of KCS
Thick green ropy discharge
Scleral injection
Corneal edema
Conjunctivitis
1 cause of KCS
Immune-mediated destruction of tear producing glandular tissue
KCS is due to insufficient ______
Test production
Corneal ulcer aka
Ulcerative keratitis
Ulcerative keratitis common in
Cats w upper respiratory infections
A corneal edema (cloudy looking) could indicate
KCS or ulcerative keratitis
Signs of ulcerative keratitis
Blood vessels seen on cornea
Corneal edema
Photophobia (aversion to light)
What is nuclear or lenticular sclerosis
Hardening/drying of the lens from center outward
Nuclear/ lenticular sclerosis common in
Older dogs and cats
Signs of nuclear lenticular sclerosis
Lens appears cloudy, hazy, bluish
Animal can still see
Cataract
What it is
Common in…
Opacity of the lens (light does not pass through
Common in older dogs and cats. More so in dogs
Signs of cataract
Can it be corrected ?
Lens appears white
Animal may be unable to see
Can be surgically corrected
Glaucoma
What it is
What causes it
Increase in pressure within eye
Usually due to inability of fluid produced within the eye to drain normally
Signs of glaucoma
May damage retina, eye may appear enlarged, color of cornea may Change
Prolapse of the gland of the third eyelid, aka
Cherry Eye
Cherry eye
What it is
Gland of third eyelid becomes enlarged, gland prolapses (protrudes), usually needs to be surgically removed
Entropion
And signs
Eyelid turned inwards
Eyelashes and facial hair irritate cornea
Signs: ocular discharge, blinking and squinting due to photophobia
Ectropion
Eyelid turned outward
May cause drying of eye but rarely causes a problem
Cosmetic issue for some owners
Ectropion normal in
Hounds
Exophthalmos
Common in
Abnormal protrusion of the eyeball.
Common in bracheosephalic breeds
A non bracheosephalic breed with an exophthalmos May indicate problems such as
Tumor
Periodontal disease
Proptosis
Common in
Displacement of eyeball from orbit
Common In bracheosephalic breeds
Strabismus
Eyes not properly aligned
Convergent strabismus
Both eyes pointed medically (cross eyed)
Divergent strabismus
One eye pointed laterally
Nystagmus
What this indicates
Side to side eye movements Indicated brain problems like Tumor Injury Inflammation
Occasionally happens after anesthesia
Bracheosephalic breeds are dispositioned to what eye conditions and why
Exophthalmos and proptosis (orbit too small for globe)
Entropion (skin folds push lid into eye)
KCS (entropion leads lids to not close over eye)
