This study was designed to determine the corneal toricity which is transferred to the front surface of a gel contact lens as the thickness of the lens varies. Five different Griffin Hydrogel contact lenses of essentially the same dimensions, except thickness. were used. Keratometer readings and a monocular subjective refraction were taken without a lens on the eye and with each of the five lenses on an eye for each of ten subjects. In general there was a direct transfer of the corneal toricity and axis to the front surface of the gel lens regardless of lens thickness. In general, the subjective astigmatic correction was unchanged with each of the five lenses. The original corneal toricity and axis, and subjective refractive cylinder are generally not altered by the wearing of Hydrogel lenses of different thicknesses.