How to tell if a soft contact lens is inside out<br>Place the contact lens on your finger. The rounded side should be downward, touching your finger. If it looks kind of like a bowl or a cup on your finger, you have it in the right orientation.
If it does not look kind of like a bowl or a cup on your finger, you have it in the wrong orientation.
If the correct orientation looks like a bowl or a cup, then it seems reasonable to believe that an orientation that did not look like either of those two shapes would be an incorrect orientation. It's difficult because this requires a high level understanding of the underlying logic.