presbyopia

A loss of accommodation that normally develops in human eyes over the age of 45 to 50 years. Vision of distant objects remains unchanged but as the eye lens gets older it loses some of its ability to change curvature to focus on near objects. Presbyopia is easily corrected by spectacles or contact lenses using weak converging lenses.

Related entries

• hyperopia
• myopia

Related categories

• HEALTH AND DISEASE
• ANATOMY AND PHYSIOLOGY

Also on this site:

Encyclopedia of Alternative Energy & Sustainable Living
Encyclopedia of History

BACK TO TOP