Nub for hard contact lens for improving movement of contact lens on eyes, is made of plastic and is rounded on upper side with diameter of certain millimeter

摘要

The nub is made of plastic and is rounded on the upper side with a diameter of approximately 1 millimeter and with a height of approximately 0.5 millimeter. The curvature of the nub in the upper rounded area has a radius of approximately 0.5 millimeter. The nub is flat at the lower side.