I've tried eye drops.... I can see about about a foot in front of me... the rest is blurry... Lights up close, and in the distance look like the snowflakes they hang on lamp posts during christmas time
Reasons my vision has ever blurred: too much time staring at the computer screen (eye strain, suggest changing monitor settings), allergies (but it has been because they are burning and watery; you'd know if it was allergies), extreme fatigue, sinus/headaches, and climate - my eyes get that way when it's really cold and dry out. They have never been consistently blurry, however, so if it lasts more than a few days, I'd go to the eye doctor for a checkup.
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