By 2020, an estimated 43 million Americans will be at risk for significant vision loss or blindness from age-related eye diseases such as cataracts, diabetic retinopathy, glaucoma, and macular degeneration. This number represents an increase of more than 50 percent over the current number of Americans with these vision-robbing diseases and conditions. The American Academy of Ophthalmology recommends that adults with no signs or risk factors for eye disease undergo a baseline eye-disease screening at age 40, which is the time when early signs of disease and changes in vision may begin to occur. Individuals with risks of, or symptoms for, eye disease are advised to schedule eye exams even earlier. A baseline evaluation determines future screenings.
P.S. A baseline evaluation of eye health is not intended as a replacement for treatment of diseases or injuries or for vision examinations needed for eyeglass and contact-lens prescriptions.