Is it safe to use Halloween colored contact lenses?

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Ophthalmologists do not recommend colored contact lenses. However, they may be used occasionally for not more than a few hours. The reason is that compared to regular glasses, most colored lenses have a lesser tendency to allow oxygen to pass through to the corneas, thus causing damage to the corneal cells. This problem does not depend on whether the user is a prescription lens user or not. It depends on the quality of the lens and a few biological variables of the person using them. I hope this helps you.