Vision (Week 9) Flashcards
3 foundations for higher levels of visual function?
VA, VF, oculomotor control
Myopia
nearsightedness
Hyperopia
farsightedness
3 stages of visual function (Colendbrander model)
optic
retinal
neural
loss of accommodation of lens?
Presbyopia
People w/Diabetic retinopathy may have good VA but reduced?
contrast sensitivity
2nd leading cause of blindness in US
glaucoma
1st leading cause of blindness in US
macular degeneration
Damage to visual pthwys beyond the organ of eye?
Hemianopic visual field
Test of gross VF deficit?
confrontation testing (“Watch my finger”)
2 gaze shifting mvmts
saccades
pursuits
Quick scanning eye mvmts?
saccades (ex. eye mvmt on subway)
smooth pursuits?
Track and follow moving target
Binocular vision depends on 2 things?
eye alignment
accomnodation
Ability of lens to strengthen its optical power so that close objects are seen clearly?
accommodation (declines after 40 yo)