Flashcards in Cortical Cataracts Deck (10):
Describe cortical (Cuneiform) cataract
(what signs and symptoms, clinical presentation)
- "glare" or "monocular" diplopia
- water vacoules, clefts between lens fibers
- cortical "spokes"
- lamellar separations
- punctate dots
How does a cortical cataract form?
(what happens to Na+/K+ pumps, alpha and beta crystalline fibers, # of amino acids, pH and lens size)
-Na+/K+ pump slows. Na+ enters and brings in H2O
- H2O comes in contact with water soluble alpha and beta crystalline fibers to form opaque aggregates
- # of amino acids in lens increase decreasing pH
- Cathepsins activates and changes pH lens decreases in size
Describe Incipient (immature) stage of cataract
(What shows under the lens capsule)
- first stage, see water vacoules under lens capsule
Describe Intumescent (Phakomorphic/Phakogenic GLC) stage of cataract
(mature and swollen?, opacities?, does it affect VA, what phyical sign is seen on the lens, can it lead to secondary glaucoma?)
- mature cataract that is swollen with opacities
- VA only slightly affected
- some spoke formation
- may lead to secondary glaucoma
Describe mature stage of cataract
(describe lens size are VA's affected)
- all fibers opaque
- lens are starting to shrink
- VA's are beginning to decrease
Describe hypermature (phakolytic) stage of cataract
(What causes it, what type of cataract is this called, describe the lens, can it lead to secondary GLC, is it inflammatory?)
- Caused by degenerated protein leakage of liquified cortex out of lens capsule
- Called Morganian cataract (completely liquified cortex)
- smaller lens (shriveled up)
- may lead to secondary GLC
- not an inflammatory condition
You see a water vacoules under the lens capsule. What stage cortical cataract is this?
You see swollen and opacified lens fibers that have some spoke formation. VA is only slightly affected. What stage cortical cataract is this?
You see opaque fibers and the lens that starts to shrink. VA are beginning to decrease. What stage cortical cataract is this?