Li M, et al. - The authors aspired to compute the changes in anterior chamber structure prior to and after exercise among healthy subjects, with the aid of the anterior segment optical coherence tomography (ASOCT). No prominent change was reported in the blinking rate during exercise. On the other hand, the anterior chamber angle, angle opening distance at 500 μm from the scleral spur (AOD500) and trabecular-iris space area at 500 μm from the scleral spur (TISA500) increased after exercise. Exercise also induced or increased iris concavity. Such variations in the anterior chamber structure were only related to exercise. This was not noted with the postexercise change in pupil diameter (PD) or intraocular pressure (IOP).

Methods

• As a part of this study, 32 healthy young individuals performed jogging for 20 min.
• Eye blinking rate was recorded during rest and exercise.
• This study also recorded ACA, AOD500, TISA500, IC, iris concavity ratio (CR), iris thickness at 750 μm from the scleral spur (IT750), anterior chamber depth (ACD), anterior chamber width (ACW), PD, IOP, blood pressure (BP) and heart rate (HR) before and after exercise.
• Anterior chamber angle (ACA), An estimation was performed of the AOD500, TISA500, IC, IT750, ACD, ACW and PD with ASOCT.

Results

• No prominent variation was illustrated in the blinking rate during exercise (13.04 ± 5.80 versus 13.52 ± 5.87 blinks/min, p=0.645), compared with rest.
• The average IOP (15.4 ± 2.4 vs 12.4 ± 2.1 mmHg), ACA (35.96 ± 11.35 vs 40.25 ± 12.64 degrees), AOD500 (0.800 ± 0.348 vs 0.942 ± 0.387 mm), TISA500 (0.308 ± 0.155 vs 0.374 ± 0.193 mm²), IC (-0.078 ± 0.148 vs -0.153 ± 0.159 mm) and CR (-0.027 ± 0.050 vs -0.054 ± 0.056) exhibited a substantial change (all p < 0.001).
• On the other hand, the average IT750 (0.463 ± 0.084 vs 0.465 ± 0.086 mm; p=0.492), ACD (3.171 ± 0.229 vs 3.175 ± 0.238 mm; p=0.543) and ACW (11.768 ± 0.377 vs 11.755 ± 0.378 mm; p=0.122) did not exhibit any notable change after exercise.