One of the scariest parts of advanced macular degeneration can be losing the ability to read facial expressions. Maria Pavlova /iStockphoto hide caption

itoggle caption Maria Pavlova /iStockphoto

Amy Myers talks with her son Kamron, 18, in the backyard of their home in Boise, Idaho. She has found raising a teenager to be extremely stressful. Kyle Green for NPR hide caption

itoggle caption Kyle Green for NPR