The losses that come with age-related macular degeneration can make depression more likely. Getty Images hide caption

Depression and chronic pain are associated with dry-eye syndrome, a British study finds. And it's more likely as you age. Boris Lyubner/Illustration Works/Corbis hide caption

Seeing better can mean living longer because it helps people remain independent. iStockphoto hide caption

A view of Interstate 65 in Alabama through bioptic lenses, which allow people who are severely nearsighted to drive. Dan Carsen/WBHM hide caption