An analysis on the corneal diopter power and corneal radius has been carried out the Korean female in the twenties age. The results were as follows. The most contact lens wears have the early stage of the twenties age, but the increase of aging have a decrease. The mean corneal diopter power on the right eye have 44.04 diopter, but left eye have 43.92 diopter. The mean of corneal radius on the right eye have the 7.66 mm, but left eye have the 7.69 mm. As a results, In increasing of the age, Most mean corneal diopter power have increase, but the mean of corneal radius have not change.