Flashcards in Cataracts Deck (43)
What is a cataract?
Increased opacity in the lens = diffuse changes throughout the lens
What is the most common cause of cataracts in cats?
How does trauma cause cataracts?
Disrupts lens fibers or causing uveitis
What endocrine disease of dogs causes cataracts?
How do you treat a cataract?
How do you ddx between a complete vs. incomplete cataract?
Can see through an incomplete cataract (tapetal reflection can be seen through it)
What type of cataract is focal and should only have minor effect on vision?
What type of cataract is a degradation process of lens proteins after the development of the cataract?
Which infectious disease of rabbits infects the lenses and cause phacoclastic cataracts and uveitis?
What teratogenic disease of cattle causes stillborn weak calves with "white eye calf syndrome" (congenital cataracts)?
Are diabetes-related cataracts uni- or bilateral?
What is a common cause of cataracts and blindness in horses?
Equine recurrent uveitis
How do you distinguish nuclear sclerosis from a cataract?
Retro illumination (will see fundus and tapetal reflection)
This type of cataract is common w//diabetes in which cataract progression is driven by an osmotic effect
What is phacoemulsification?
Lens broken up using ultrasound energy and aspiration
What is nuclear sclerosis?
Hardening of the lens that occurs naturally in animals
Does nuclear sclerosis cause vision loss?
What causes the osmotic pulling effect of an intumescent cataract when trapped within the lens capsule?
Are cataracts hereditary?
No but they can be congenital
How can you judge the position of opacity in the lens?
How can you decide the depth of an opacity in the lens?
Anterior opacities move in the ____ direction as the eye
Posterior opacities move in the ____ direction as the eye
How do nuclear sclerosis opacities move relative to the eye?
Appear to remain stationary
What are the 4 stages of cataract maturation?
Incipient, incomplete/immature, complete/mature, resorbing
How does the lens appear with a resorbing cataract?
Shriveled like a raisin
How large is an incipient cataract?
<20% of lens affected
In addition to the wrinkled appearance, what will you see in the lens when it starts to liquify and resorb?
With which type of cataract might you see separation clefts (Y-suture)?