Just like strengthening muscles in the body, strengthening the small muscles in the eyes can be effective for many common vision disorders, such as nearsightedness, farsightedness, presbyopia (the need of reading glasses in aging eyes), astigmatism, lazy eye, crossed eye, poor night vision and light sensitivity. Eye exercises are designed to strengthen the eye muscles and teach them how to relax. Daily practice can result in vision improvements in 30 to 60 days. However, more serious conditions like glaucoma, retinopathy or cataracts cannot be helped by exercising the eyes. You should always consult with your doctor before you start any eye exercise program.
(Suzanna McGee @ www.livestrong.com)