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