Soft contact lens identification.

Measuring procedures used for hydrogel contact lenses are sufficiently difficult to make identification of a given soft lens annoyingly time-consuming and sometimes impossible. Etching a number or letter on the lens when it is received from the laboratory allows the practitioner to tell whether the proper lens is being worn, even while the lens is still on the patient's eye. A sharp pointed tool on a dry hydrogel lens produces this identifying number.