The aim of the study was to identify the IOP curve of an Egyptian population sample which contained 1504 eyes of normal population , there were 752 male s eyes ( 50%) and 752 were female s eyes ( 50%) , the mean IOP in age group from 20 – 30 Years is 13.57 +/- 2.3 mmHg , in age group from 31 to 40years the mean IOP is 13.61 +/- 3.6 mmHg , in the age group from 41 to 50 years the mean IOP is 14.49 +/-3.8 mmHg , and in the age group from 51 to 60 years the mean IOP is 14.49 +/- 3.6 mmHg . The difference between the mean IOP in male groups and female groups was statistically insignificant.