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There are several ways to tell if your contacts are inside-out. First, many of the most popular lenses have so-called inversion markings - you can tell the lens is inside out if the writing does not appear correctly. Second, the lens will tend to cup inwards when you are holding it correctly. Finally, if you put the lens on your eye inside out, the lens will tend to slide around on your eye.
|Jennifer Mathes, Ph.D.|