Psychology 2043A/B Chapter Notes - Chapter 12: Object Permanence, Assistive Technology, Hypoplasia
27 Jan 2017
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Document Summary
50-70% of children with visual impairments have multiple disabilities. Blind children used to attend residential schools for the blind where they learned to read braille. Children are now mostly served in their neighbourhood schools. Blindness: a physical standard of sight at less than 20/200 meaning that they can"t see within a vison correction at 20 feet what the typical person sees at 200 feet. Low vision: after correction can see 20/70-20/200 vision. A snellen chart which has rows of letters that get smaller and smaller can be used to test vision from 20feet away. Hereditary conditions, infectious diseases, cancer, injuries, premature birth, and various environmental conditions. Retinopathy or prematurity: a genetic disorder that was widely believed to be cause by the over administration of oxygen to premature babies in an attempt to save their life. However, it seems to be more complicated then that and can also be associated with low birth weight.
