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. Your vision is one of your most important senses, and by not recognizing the signs of eyestrain, you leave yourself subject to a host of problems including: Headaches; Blurred vision; Eye pain; Dry eyes; Wet eyes; Double vision; Eye fatigue; Brain fog; Burning sensation; Difficulty focusing; Night vision sensitivity; Neck & shoulder pain; Poor visual acuity; Bloodshot eyes.The good news is that there is no reason to suffer from any of these common and annoying symptoms. Noted optometrist and bestselling author Jeffrey Anshel, OD, has written a guide to understanding and eliminating all of them. Written in plain English, WHAT YOU MUST KNOW ABOUT EYESTRAIN provides the latest up-to-date information you will need to identify the source of the problem-from display screens to inadequate lighting to poor nutrition and aging. If you are one of the millions of people suffering from eyestrain, you will discover that with few exceptions most of the solutions are both simple and relatively inexpensive to do. With a copy of WHAT YOU MUST KNOW ABOUT EYESTRAIN in hand, it should definitely help you see the light.