I've always wondered how colored contact lenses work. Are they completely colored, or is there a clear spot in the center for the pupil?
If they are completely colored, wouldn't blue contact lenses tint your vision blue, like sunglasses? If there is a clear hole for the pupil, how does the fact the pupil changes size affect things? I would think when the pupil got really small you would see a small circle of the original eye color around it, and when it got big it would tint the edge of your vision.
Orignal From: How do colored contact lenses work without tinting your vision?
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