eye reaches peak strength in the young adult, around the mid- to late-20s.
This strength involves many abilities not measured by eye charts. Night
vision, eye-hand coordination, motion and depth perception, and color
discrimination may all improve during this time. During the years of
increasing visual abilities, nutrition is essential for optimum vision
By the time we reach our mid- to late-30s, it may begin to be difficult
to focus on close objects. The ciliary muscles that adjust the thickness of
the lens start to weaken. Meanwhile, the lens itself loses its elasticity. Consequently,
the ability of lens to focus at close range decreases. Most people notice signs
of "aging eyes," or presbyopia, around the age of 40 to 45, when they begin
holding reading material at arms' length. You will probably need to wear reading
glasses, bifocals, or multifocal glasses or contact lenses to correct your vision at this stage. The condition will usually stabilize by the age of 65 or 70 but may progress indefinitely.
our mid-40s, the iris muscles tend to slow. The reflex response decreases,
increasing the amount of light entering the eye. For many people, sensitivity
to glare starts at this age. Their eyes may be overexposed to the sun
and other UV light, potentially causing permanent damage. Eyewear with
ultraviolet radiation protection can shield the eyes from the harmful
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