1. A corneal contact lens comprising a transparent pupil section, an iris section surrounding said pupil section, and a colored, opaque, intermittent pattern deposited on a surface over said entire iris section, that leaves a substantial portion within the interstices of said pattern uncolored, said pattern covering at least 30 percent of the surface of said iris section, the elements of the pattern being undiscernable to the ordinary viewer, thereby providing a lens capable of coloring the iris but permitting visualization of the structure of the iris of a person wearing said lens.