Too many causes...: The only way to know why the vision is blurred is to get an eye exam. This could be anything from a simple need for glasses to a medical problem affecting the eyes internally. Intermittent blurring can be from dry eye, allergy, and eye strain (excessive close work such as reading). Get an eye exam, preferably from an ophthalmologist because they can diagnose both simple and complex problems.
Answered 6/18/2013
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