ABSTRACTThe experiment was conducted on a sample of 26 subjects including both males and females and a control group of five. Their mean age was a little over 24 years. Corneal thickness and configuration were measured before and after the subjects had been wearing rigid and flexible contact lenses for three hours; measurements were also taken on control subjects at two different sessions, before and after a three-hour period. The statistical analysis showed a low but significant correlation between corneal thickness and corneal shape.