PEDS302 Chapter Notes - Chapter 10: Stereopsis, Sensory Neuron, Sensory Nerve

• School: University of Alberta
• Department: Physical Education and Sport
• Course: PEDS302
• Professor: Kelvin Jones

Document Summary

Infants have functionally useful vision: by 6 months of age, vision is adequate for locomotion through the environment, size of eye doubles between birth and maturity. In the first month, acuity is 20/400 (5% of adult level). Infant can differentiate facial features at20 inches: acuity is approximately 20/30 by age 5 years and 20/20 by age 10. Visual changes with aging: declines in vision have implications for skill performance and everyday living tasks, presbyopia affects ability to see nearby images (can be corrected with lenses, older adults need more light in dim environments. Lack of eye-hand coordination: squinting, under-or overreaching for objects, unusual head movements. Perception of space: requires perception of depth and distance. First off, you need two eyes for this to work and have them separated so that they each detect the same visual scene from a slightly different perspective. The difference is then used to perceive 3d.