vision loss vision loss vision loss developed issues with vision vision loss 75 percent نابینایی در سنین پیری 1 in 3 Americans 1 in 3 Americans 1 in 3 Americans vision loss in older people vision loss vision loss vision loss 1 in 3 Americans American Family Physicians 70 million by 2030 Vision Loss 70 million by 2030 AAFP vision loss http://www.aafp.org/afp/1999/0701/p99.html vision loss Vision loss vision loss vision loss American Academy of Family Physicians vision loss Vision Loss vision loss vision loss 70 million by 2030 American Academy of Family Physicians