assessment of infants Flashcards
average VA
new born 6/120-6/360
1yr- 6/15-6/90
2yr 6/9-24
3yrs 6/5-6/12
average rx
average stereopsis value
hundreds and thousands
if child able to pick up small sweets at 33cm then va is at 6/24
equates to 6/60
6-9month old
occlusion behaviour
if good eye covered then child not happy and will try to move
keeler preferential looking cards
stimulus on one side blank on the other
card held at 50 cm
observe Childs behaviour where they prefer to look
acuity is lowest size grating where preferred fixation is noted
lea symbols
Kays pictures
range 6/10-6/6
Sheridan gardner
book of snellen letter in a range if sizes
no crowding as only single letters available therefore overestimates VA
3 letters at each acuity
used either 3m or 6m
Cardiff acuity cards
optokinetic nystagmus
done using optokinetic drum
observe eye movements
smooth pursuit in the direction of the stripes followed by a quick saccade back to the starting position.
Observe the response in both directions, noting any asymmetry or abnormalities in the eye movement pattern.
if strabismus present ,lack of bsv disrupts this process and makes it asymmetrical