The Development of Vision Rain Bosworth, Ph.D.

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Why study visual development?1) Curiosity about what infants can see.2) Nature vs. Nurture - Is experiencenecessary for visual development?3) Define critical periods and plasticity4) How neural substrates mediate perceptionWhy study visual development?-Clinical applications:1) Early onset eye disorders:cataracts, refractive error, strabismus, ptosis-If not treated, cause Amblyopia-Must know what “normal” visualdevelopment is!Dense central cataract:Strabismus:
Why study visual development?-Clinical applications:2) Earlier detection of disorders:For example, possible abnormal visual function inAutism – social deficits not obvious until after 1year of age, but visual deficits could be presentearlier.... This was suggested for dyslexia too – visual motiondeficits may precede reading by several years.… Possibly true for other developmental disorders aswell.Outline of Today’s Lecture:I. Brief overview of neural developmentII. Visual Psychophysics – How do we studyvision in infants?III. Infant Vision (Ages 1 - 6 months):1) “spatial” vision2) reasons for immaturity3) luminance, color, and motion
Page 4 and 5: I. Neural Overview:Primary Visual C
Page 6 and 7: Rough schematic of visual brain are
Page 8 and 9: II. Visual Psychophysics - HOW do w
Page 10 and 11: Grating StimulusGratings are define
Page 12 and 13: And NOW, how do we measure visualse
Page 14 and 15: Grating StimulusSpatial Frequency -
Page 16 and 17: Example contrast sensitivity functi
Page 18 and 19: What limits infant vision?Eye devel
Page 20 and 21: Infant Photoreceptors in the EyeB)
Page 22 and 23: Development of Sensitivity forChrom
Page 24: Development of Sensitivity toMotion
Page 27: What can infants see? - StereopsisN

The Development of Vision Rain Bosworth, Ph.D.

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