Changes in intraocular pressure after exercise test

Abstract

BACKGROUND: The decrease in intraocular pressure (IOP) within exercise has been recently suggested; however, this change remained ambiguous following exercise test. The present study aimed to assess changes in IOP induced by exercise test in patients who suspected to coronary artery disease (CAD) and indicated for exercise test evaluation. METHODS: In a cross-sectional study at the cardiovascular research center of Amin Heart Hospital in Isfahan, 101 eyes from 51 consecutive patients suspected to CAD aged 30-70 years referred for exercise testing were evaluated. IOP was measured at the three time points of before exercise test as well as 5 and 20 min after completing exercise test using Schiotz tonometer. All exercise tests were programmed by the treadmill. RESULTS: The mean IOP in all assessed eyes was 16.12 +/- 2.61 mmHg initially that was gradually decreased to 13.79 +/- 2.40 mmHg 5 min after the exercise test, but elevated to 15.67 +/- 2.26 mmHg 20 min after the test. Assessing IOP following exercise testing showed a significant decrease in IOP in 75 eyes (74.3), remained unchanged in 19.8 of eyes, and even elevated in 5.9 of eyes. There was a significant direct association between patients' age and IOP changes assessed by the Pearson's correlation test (r = 0.350,P = 0.009). No significant difference was revealed in the trend of the changes in IOP after exercise test between men and women, between left-sided and right-sided eyes as well as between different body mass index subgroups. CONCLUSION: IOP temporarily reduced after exercise test, but return to baseline value shortly after test. This lowering is more evident in advanced aging.