The Uvea Flashcards
what should the pupil be like in uveitis?
miotic
why is intra-ocular pressure usually low in uveitis?
increased outflow
decreased aqueous production
what is aqueous humor like in health?
very low in protein
how can we score flare?
1+ through 4+ in literature
mild/moderate/severe
what is heterochromia iridis?
eye color differs between eyes or within the same eye
what are colobomas?
missing portions of tissue
what is golden retriever uveitis characterized by?
pigmentary changes
what is iris atrophy?
common aging change especially in small breeds
also cats
why is diagnosis of uveal neoplasia difficult?
difficult to biopsy intraocular structures
what is canine uveal melanoma like?
usually pigmented
usually distinct mass
usually iris: rarely choroidal
what is the treatment of choice in most cases with lymphoma in the eye?
chemotherapy
when should you refer uveitis immediately?
vision loss
retina/posterior segment signs
elevated intra-ocular pressure
hyphema
significant iris changes
what steroids can penetrate the cornea?
prednisolone acetate
neopolydex
what is in the anterior uvea?
iris
ciliary body
what are the functions of the uvea?
vascular, nutritional supply to eye
waste removal
aqueous humor production
blood-aqueous barriers
control of pupil size
what are keratic precipitates?
deposits of inflammatory cells or other material
what is corectopia?
abnormal pupil position
what is scleral injection like compared to conjunctival hyperemia?
larger vessels
not mobile
do not blanch with pressure
what is hypopyon?
white blood cells causing flare
what is a persistent pupillary membrane?
retained fetal vascular network
originates at iris collarette
when should you worry about persistent pupillary membrane?
extensive
corneal changes
what are colobomas usually due to?
incomplete or delayed closure of optic fissure
who can have collie eye anomaly?
collies
shelties
australian shepherds
border collies
what are uveal cysts like?
spherical
variably pigmented
where can uveal cysts be?
attached to iris or ciliary body
free floating
ruptured on corneal endothelium
when are uveal cysts concerning?
filling anterior chamber
golden retrievers
glaucoma: great dane, american bulldog
what is golden retriever uveitis like when mild?
iris cysts
radial pigment on lens capsule
darkened iris, entropion uveae
is canine uveal melanoma usually benign or malignant?
benign
is feline uveal melanoma usually benign or malignant?
malignant
what is feline uveal melanoma like?
tricky to diagnose
nonpigmented variants
diffuse pigmentary changes
when is aqueous humor cytology useful?
only lymphoma
what is uveitis?
inflammation of all or part of vascular tunic of the eye
what primary neoplasias can cause uveitis?
melanoma
ciliary adenoma
can systemic disease cause uveitis?
yes
can you use topical NSAIDs and steroids together?
yes
do topical cyclosporine and topical tacrolimus penetrate the cornea?
no
what are some complications of uveitis?
synechiae
cataracts
lens luxation
retinal detachment
glaucoma
