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(Course Logo: Adult walking with cane and holding a child's hand)Designing for the Life Span Segment 3

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Slide 11

Slide 11 Content

Vision changes over time are complex and numerous. While hearing changes are profound, changes to the human eye and what we see and perceive condition how we will relate to an environment that continues to grow in visual complexity. Age changes to the eye include:

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The human eye has a specific design that has inherent limitations in capability. The human eye does not see the spectrum of color to the ultraviolet blues or the infra-reds. It cannot detect motion as well as a hawk looking for prey in a grassy field. The house fly has a greater capacity to see pattern.

Issues of acuity can be addressed by the prosthesis of eye glasses, contact lenses or, now, lasic surgery. Cataracts can also be addressed through surgery and the use of replacement prosthetic lenses. Lens replacements have also had a beneficial effect upon color perception for some older adults.

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