Figure 7: There were statistical correlations between age and SA, A.C.D and SA in Male group, multiple linear regression showed statistic differences between SA of anterior corneal surface and age with A.C.D (y=0.236x1+0.570x2-0.242, r1 2 =0.02, r2 2 =0.203, p<0.000, 1=A.C.D, 2=age), that of total corneal surface and age with A.C.D (y=0.609x1-0.149x2+0.246, (r1 2 =0.514, r2 2 =0.301, p<0.000, 1=A.C.D, 2=age)