Dr. Jeffrey Anshel, co-author of What You Must Know about Age-Related Macular Degeneration, reveals the top cause that you should avoid.Macular degeneration is the leading cause of vision loss among older U.S. adults, but there are proven ways you can help protect your eyes. Dr. Jeffrey Anshel, co-author of What You Must Know about Age-Related Macular Degeneration, reveals the top cause that you should avoid. He discusses how this issue develops, the various stages of the disease and the differences between wet and dry macular degeneration. Bonus! How to Spot Lung Cancer Early