Glasses for reading and distance vision may have been around for more than 700 years but some people still aren?t wise to them. Vanity or just a stubborn conviction they?re not needed are usually the main excuse. Bluntly, that?s crazy! By avoiding glasses you may hasten a much more severe loss of vision. So, how do you know if and when you need glasses? The first symptoms of weakening eyesight are blurring of either near or distant objects. You can test this by reding a phone book or a distant sign and checking if others can read what you can?t. You may also have difficulties with night vision. Frequent headaches after reading are another symptom, or if you have to screw-up your eyes (squint) to focus. Of course, an eye doctor can tell you pretty quickly if you need glasses. Everyone should have their eyes tested every few years when younger and annually once past 50s (or before if you already have glasses). These days you can get barely visible glasses and, of course, totally undetectable contact lenses. So there?s absolutely no need to neglect your vision. See?
Source: http://blog.kaplansky.com/2011/09/02/keeping-an-eye-on-your-vision/
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