ABSTRACT Using four wearers of Mueller Welt Silcon contact lenses as subjects, keratometer readings were taken in the morning prior to wearing lenses and at regular intervals throughout the day. Mean horizontal and vertical curvature varied about 0.25 or less throughout the diurnal period. The results of this study make it appear that there is considerably less diurnal change in corneal curvature of Silcon lens wearers than of conventional hard contact lens wearers and approximately the same, or perhaps less change, with the Silcon as compared with changes found in wearers of the Bausch and Lomb Soflens.
Jack F. Hill (Tue,) studied this question.