Some people think that an expiration date means the product goes bad, like milk. They don't realize that when it's on things like medicine it means that its efficacy is no longer guaranteed.
wrong moron. in the optical industry. if the visine is from '01, it IS "bad" and can damage your eyes! the idea regarding efficacy is within a 'reasonable time'. in the case of an opened bottle of visine, it would be a couple of months.
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