“Often, the first thing people notice is their loss of ability to see distance,” notes Terry McGowan, the American Lighting Association’s (ALA) director/engineering & technology and the owner of Lighting Ideas in Cleveland. “That happens around age 45 and is called presbyopia. By 60, most people have a ‘fixed focus’ optical system and need glasses. After age 60, eye and visual system changes accelerate so that less light reaches the eye. Therefore people need more light to see details.” Basically, the follow changes are occurring: reduced visual acuity (ability to see small details); reduced contrast sensitivity (harder to see differences between light and dark objects and surfaces); reduced color discrimination; longer time required to adapt to large and sudden differences in brightness; and increased sensitivity to glare.
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Written by: Linda Longo
Source: Enlightenment Magazine