Do you often find yourself rubbing your eyes? After working on a display screen or reading a book, do you wind up having a headache? Do you seem to have problems focusing your vision, with or without glasses?

If the answer to any of these questions is yes, you may be suffering from eyestrain—and What You Must Know About Eyestrain is the book that all of us need to have.

Written by the noted optometrist and bestselling author Jeffrey Anshel, OD, this book provides you with the most up-to-date information required to identify the source of your eyestrain—whether it is your display screen, inadequate lighting, poor nutrition, or merely the process of aging—and to take the necessary steps to resolve it. 

He joins Dr. Roizen to talk about his work, his 20-20-20 rule, and how to keep your eyes in tip-top shape even if you're on the computer all day!