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36 Cards in this Set

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  • Back
  • 3rd side (hint)
refractive error at birth
hyperopia
type of astigmatism most likely found in infancy
ATR
accom. matches that of an adult at what age?
~ 6 mo.
Which part of the retina develops first?
central
@ what age is a foveal reflex present?
15 mo.
@ ~3 mo. of age what parts of the visual system have reached maturity
contrast flicker frequency
scotopic luminosity
photopic luminosity
@ ~4 mo. of age what parts of the visual system have reached maturity
absolute threshold
stereopsis
contrast sensitivity (3-4mo)
What has reached maturity @ 6 mo.
color vision
@ what age is grating acuity mature?
4 yrs
@ what age is vernier acuity mature
6 yrs
@ what age does an infant turn their head toward sound?
3 mo.
@ what age does an infant lift head and chest when placed on stomach
3 mo.
@ what age does a child develop the palmar grasp
6 mo.
@ what age does a child develop the pincer grasp
1 yr
@ what age does a child begin to crawl on their belly
1 yr
What vision and fine movements does a child have @ the age of 2 yrs?
scribbles
can draw line
builds tower of 4 or more blocks
@ what age does a child know several words
18 mos.
@ what age should a child be able to kick a ball and begin to run
2 yr.
@ what age should a child be able to copy a circle
3 yrs
what age should a child know their colors
3 yrs
@ what age should a child know their name, age and sex
3 yr
@ what age should a child be able to copy a cross
4 yrs
@ what age do children develop pursuits
3 mo.
How many ocular dominance columns are there?
7
Which ocular dominance column is driven only by contralateral innervation?
1
Which ocular dominance column has equal innervation from each eye
4
which ocular dominance column only receives innervation from the ipsilateral eye
7
How long is the critical period for the human visual system?
9 yrs (first 2 yrs. most important)
what is the cause of amblyopia?
poorly developed cortical architecture
not a poorly developed eye
A congenital cataract can cause what type of amblyopia?
occlusion amblyopia
what type of amblyopia is caused by unequal refractive errors
anisometropic amblyopia
What type of refractive error is most likely to cause anisometropic amblyopia
unequal hyperopic eyes
(more hyperopic eye will be supressed)
what causes meridional amblyopia
large amts. of uncorrected astigmatism
OKN drum is used to test what type of eye mov't
pursuits
what type of lesion would cause an inability to follow the OKN drum
parietal lobe
does tonic vergence increase or decrease with age
increase
presbyopic pts. are more eso