To analyze the change of intraocular pressure of normal adults measured by non-contact tonometer with age and to provide theoretical basis for health education of intraocular pressure.

A total of 330 employed workers and retired employees (330 eyes, right eye) from a work unit who underwent physical examination in Beijing Tongren Hospital were selected from June to September 2019. According to the age of each 10 years, they were divided into 7 groups, including 31 cases in 20 to 29 years old group, 38 cases in 30 to 39 years old group, 32 cases in 40 to 49 years old group, 54 cases in 50 to 59 years old group, 43 cases in 60 to 69 years old group, 60 cases in 70 to 79 years old group and 71 cases in 80 to 90 years old group. The intraocular pressure was measured using a non-contact tonometer. Analysis of variance was used to compare the differences in intraocular pressure between different age groups and the effect of age on intraocular pressure was analyzed.

The age of the 330 subjects in this study ranged from 20 to 90 years old, and the intraocular pressure value was (13.57±3.42) mmHg. There were statistically significant differences in intraocular pressure among age groups (F=4.36, P<0.01) . The 7 groups were regrouped into 20 to 59 years old group (155 eyes) and 60 to 90 years old group (175 eyes) , and intraocular pressure was respectively (14.53±3.18) mmHg and (12.72±3.41) mmHg, and the differences between the two groups were statistically significant (t=4.98, P<0.01) . Simple linear regression analysis showed that the intraocular pressure decreased by 0.04 mmHg/year with the increasing age (95%CI -0.06- -0.02) .

In normal people aged from 20 to 90 years old, the intraocular pressure drops after the age of 60. Therefore, determination of the normal range of intraocular pressure needs to be adjusted according to age so as to promote early detection, early diagnosis and early treatment of glaucoma.

Adult; Intraocular pressure; Age factor; Health education