Presbyopia

Presbyopia is presented as age-related loss of close focusing ability rather than nearsightedness. Presbyopia was defined by impaired binocular near visual acuity that was correctable with near-vision glasses while distance vision remained at least 6/12 in both eyes. Presbyopia is age-related and eventually affects nearly all older adults, but it is correctable with simple near-vision glasses. The source attributes presbyopia to interacting changes in eye-muscle control, tissue flexibility, collagen stiffness, lens changes, and brain-eye control. Age-related visual decline is framed as involving both local eye changes and broader systemic stressors. The source treats age-related near-vision decline as a functional performance problem that may be addressed before relying fully on stronger readers.