Abstract
PurposeTo explore ocular changes in healthy people after exercise.MethodsTwenty five volunteers underwent exercise for 15 minutes on a treadmill. Measurements of choroidal thickness, intraocular pressure (IOP), ocular biometry, and blood pressure were taken before and after exercise. Enhanced Depth Imaging optical coherence tomography (EDI-OCT) was used to measure choroidal thickness at the fovea. Intraocular pressure (IOP) was measured by Goldmann applanation tonometry. Ocular biometric measures were collected using A scan ultrasound. Blood pressure was measured concurrently with the acquisition of the scans.ResultsTwenty five volunteers (25 eyes) with a mean age of 25.44±3.25 years were measured. There was a significant increase in systolic and diastolic pressure after exercise (P<0.05). The IOP showed a significant decrease after exercise (P<0.05). However there was no significant difference in the mean choroidal thickness, ocular axial length, anterior chamber depth, lens thickness, or vitreous length before and after exercise measurements (P>0.05).ConclusionThere was a significant decrease in IOP from exercise without a change in choroidal thickness and ocular biometric measures. IOP and choroidal thickness were not correlated, suggesting that the IOP decrease from exercise is not due to changes in choridal thickness.
Highlights
Exercise has been demonstrated to lead to changes in a range of ocular parameters
Given that exercise is known to alter intraocular pressure (IOP) and choroidal blood flow, we were interested in investigating the influence of exercise on IOP, choroidal thickness, ocular biometrics including axial length (AXL) to determine whether IOP reduction is correlated with changes in the choroid
In this population of young adult subjects, 15 minutes of dynamic exercise was found to lead to significant changes in IOP, consistent with prior reports showing that exercise leads to IOP reduction (Table 1 and Figure 1, 2)
Summary
Exercise has been demonstrated to lead to changes in a range of ocular parameters. Physical activity has been found to cause changes in some ocular parameters such as ocular blood flow [6,7], tonic accommodation [8], pupil size [9], anterior chamber angle [10] and retinal activity [11]. Some investigators have theorized that increased choroidal volume may be enrolled in the mechanism of IOP elevation [12]. Given that exercise is known to alter IOP and choroidal blood flow, we were interested in investigating the influence of exercise on IOP, choroidal thickness, ocular biometrics including axial length (AXL) to determine whether IOP reduction is correlated with changes in the choroid
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