I always take out my contacts at night, because usually my eyes are already irritated by the evening that I can't wait to take them out. My sister though, left her contacts in for 4 days one time, when she was out partying, and she got a silent infection so bad in her eyes that the dr told her that had she left it (the contacts or the infection) for another couple of days, she would have gone blind. That really scared me.
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