Cataracts Flashcards
A cloud lens prevents
Light from focusing sharply on the retina
Most common complaint of cataracts
Difficult driving at night
Types of cataracts
Nuclear, cortical, subcapsular
Cataract is the name given to any
Light scattering opacity within the lens
As we age ____ resulting in cloudiness and increased density of the lens
Protein precipitate out of the lens matrix
Symptoms of cataracts
Decreased vision
Monocular diplopia
Second sight
When someone with cataracts is suddenly able to see close up because of lens changes and acts stronger
How does light reflex change in a cataract
Poor red reflex
Looks brown
Classic diabetes cataract
Snowflake cortical opacities
Cataract in diabetic patients commonly present as
Cortical or posterior subcapsular cataracts
When you have your natural lens
Phakic
When cataract is removed but not replaced
Aphakic
When cataract is replaced with an artificial lens
Pseudophakia
Wilson’s disease
Sunflower cataract
Due to copper deposition (chalcosis lentis)
Drugs used in autoimmune diseases can cause cataracts
Corticosteroids
This stage is irreversible and opacity do not clear
Stage 2 & 3
Clear, spherical and fluid filled spaces within the lens cortex
Lens vacuoles
Most studies have shows that only ___ are associates with increase exposure to sunlight
Cortical cataracts
Loss of transparency associated with calcium probably caused bu
Action of calpain II (protease)
Most common type of cataract
Nuclear cataract
Gives you second sight
Cortical cataracts tends to occur more often in pts with
Diabetes
Cortical cataracts
Start on the edge and progress towards the center
Electric shock
Might give you a cataract from trauma
Endophthalmitis
Infection of the whole eye
Complication of cataract surgery
