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Purpose  To measure changes in anterior chamber structure before and after exercise in healthy individuals using anterior segment optical coherence tomography ( ASOCT ).    Methods  Thirty‐two healthy young individuals performed jogging for 20 min. Eye blinking rate was recorded during rest and exercise. The anterior chamber angle ( ACA ), angle opening distance at 500  μ m from the scleral spur ( AOD 500), trabecular‐iris space area at 500  μ m from the scleral spur ( TISA 500), iris concavity ( IC ), iris concavity ratio ( CR ), iris thickness at 750  μ m from the scleral spur ( IT 750), anterior chamber depth ( ACD ), anterior chamber width ( ACW ), pupil diameter ( PD ), intraocular pressure (IOP), blood pressure (BP) and heart rate (HR) were recorded before and after exercise. Anterior chamber angle (ACA),  AOD 500,  TISA 500,  IC ,  IT 750,  ACD ,  ACW  and  PD  were measured with  ASOCT .    Results  Compared with rest, the blinking rate during exercise did not change significantly (13.04 ± 5.80 versus 13.52 ± 5.87 blinks/min, p   =   0.645). The average  IOP  (15.4 ± 2.4 versus 12.4 ± 2.1 mmHg),  ACA  (35.96 ± 11.35 versus 40.25 ± 12.64 degrees),  AOD 500 (0.800 ± 0.348 versus 0.942 ± 0.387 mm),  TISA 500 (0.308 ± 0.155 versus 0.374 ± 0.193 mm 2 ),  IC  (−0.078 ± 0.148 versus −0.153 ± 0.159 mm) and  CR  (−0.027 ± 0.050 versus −0.054 ± 0.056) changed significantly (all p   <   0.001), while the average  IT 750 (0.463 ± 0.084 versus 0.465 ± 0.086 mm; p   =   0.492),  ACD  (3.171 ± 0.229 versus 3.175 ± 0.238 mm; p   =   0.543) and  ACW  (11.768 ± 0.377 versus 11.755 ± 0.378 mm; p   =   0.122) showed no significant change after exercise.    Conclusion  The blinking rate did not change significantly during exercise, while  ACA ,  AOD 500 and  TISA 500 increased after exercise. Exercise also induced or increased IC. These changes in anterior chamber structure were only associated with exercise, but not with the postexercise change in  PD  or  IOP .

Influence of exercise on the structure of the anterior chamber of the eye