This eye strain affects the ability to focus and relax completely, and over time the eyeball changes shape to compensate. The irregular shape of the eyeball causes light to focus too far in front of the retina (in nearsightedness) or too far behind (in farsightedness). The cornea can also become squashed (astigmatism) which is a common effect of being near sighted. How Eye Exercises Work Eye exercises work by first strengthening the six groups of eye muscles, and then helping them to relax completely each day to improve vision on a progressive basis. They usually form a vision training program of 30-60 days (or more in severe cases) and are known to be effective on all common vision disorders. However, eye exercises cannot cure more serious eye conditions like cataracts, glaucoma and retinopathy. Scientific Evidence Over the years, many scientific studies on vision training have produced favourable results.
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Selecting Sunglasses for Healthy Eyes
Your best bet is to look for sunglasses that claim to block most or all UV. For example, “99-100 percent UV absorbent” or “UV 400.” However, there is no independent verification for such claims, so you might want to have an optician test your sunglasses to find out if they block all or most UV, the UC Berkeley researchers noted in a university news release. For those not in the market for a new pair of shades, it might be a good idea to have your old sunglasses tested, because scratches and abrasions can wear down UV coating over time. An optician can also put a UV-protective coat on sunglasses. Be aware that darker lenses don’t necessarily provide greater UV protection. And, darker lenses that don’t block UV can be more harmful than wearing no sunglasses at all because they cause pupils to open wider and allow more UV to enter your eyes.
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