Exercise and iris concavity in healthy eyes

Haargaard, Birgitte; Jensen, Patricia; Kessing, Svend Vedel; Nissen, Ole I.

doi:10.1034/j.1600-0420.2001.790313.x

Cited by 20 publications

(18 citation statements)

References 22 publications

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“…Physical activity has also 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].…”

Section: Introductionmentioning

confidence: 99%

The Short-Term Effects of Exercise on Intraocular Pressure, Choroidal Thickness and Axial Length

et al. 2014

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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.

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Section: Introductionmentioning

confidence: 99%

The Short-Term Effects of Exercise on Intraocular Pressure, Choroidal Thickness and Axial Length

et al. 2014

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“…19 Changes in retinal blood flow with dynamic exercise have also been studied, with reported changes typically being of small magnitude, suggesting a stronger auto-regulatory capacity in the retinal vasculature. 20,21 Physical activity has also been found to cause changes in other ocular parameters such as tonic accommodation, 22 pupil size, 23 anterior chamber angle 24 and retinal activity; 25 however, the influence of exercise on ocular biometrics such as AXL is not known. Given that exercise is known to alter IOP, and that changes in IOP have been found to be associated with variations in AXL, we were interested to investigate the influence of a period of dynamic exercise on AXL (and a range of other ocular biometrics) and IOP in a population of young adult subjects.…”

Section: Introductionmentioning

confidence: 99%

The short-term influence of exercise on axial length and intraocular pressure

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Collins

2011

Eye

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Purpose The aim of this study is to investigate the short-term influence of a period of dynamic exercise on axial length (AXL) and intraocular pressure (IOP) in young adult subjects.Patients and methods In all, 20 young adult subjects (10 myopes and 10 emmetropes) participated. Baseline measures of ocular biometrics, IOP and ocular pulse amplitude (OPA) were taken following a 20-min rest period. Subjects then performed 10 min of moderate intensity, low impact dynamic exercise (bicycle ergometry). Measures of ocular biometrics, IOP and OPA were repeated immediately after, and then 5 and 10 min after this exercise task. Systemic blood pressure and pulse rate were also monitored. A repeated measures analysis of variance was used to investigate the changes in the measured parameters. Results Exercise resulted in significant changes in a range of ocular parameters. A small but significant decrease in AXL was observed following exercise (Po0.0001). The largest change in AXL was noted immediately following exercise (mean decrease À17 ± 10 lm). IOP and OPA also decreased significantly following exercise (Po0.0001). A moderate but significant positive association was found between the changes in AXL and the changes in IOP (r 2 ¼ 0.36, Po0.0001). There were no significant differences found between the myopic and emmetropic subjects in the magnitude of changes observed in ocular parameters following exercise. Conclusion The physiological effects of dynamic exercise lead to changes in a range of ocular parameters, including significant reductions in IOP, OPA and decreases in AXL.

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“…Haargaard et al. () reported that, because of the reverse pupillary block, iris would bow posteriorly during exercise in normal individuals and Jensen et al. () also observed that exercise could induce or increase IC in eyes with PG.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, given the abnormal anterior chamber configuration and distinct postexercise IOP change in patients with PDS/PG compared with healthy individuals, Haargaard et al. () speculated that reverse pupillary block in healthy individual is a physiological phenomenon during exercise, while that in PDS/PG patients is a pathological status.…”

Section: Discussionmentioning

confidence: 99%

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

Song

Zhao

Yan

et al. 2017

Acta Ophthalmologica

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PurposeTo measure changes in anterior chamber structure before and after exercise in healthy individuals using anterior segment optical coherence tomography (ASOCT).MethodsThirty‐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 μm from the scleral spur (AOD500), trabecular‐iris space area at 500 μm from the scleral spur (TISA500), iris concavity (IC), iris concavity ratio (CR), iris thickness at 750 μm from the scleral spur (IT750), 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), AOD500, TISA500, IC, IT750, ACD, ACW and PD were measured with ASOCT.ResultsCompared 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), AOD500 (0.800 ± 0.348 versus 0.942 ± 0.387 mm), TISA500 (0.308 ± 0.155 versus 0.374 ± 0.193 mm2), 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 IT750 (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.ConclusionThe blinking rate did not change significantly during exercise, while ACA, AOD500 and TISA500 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.

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Exercise and iris concavity in healthy eyes

Cited by 20 publications

References 22 publications

The Short-Term Effects of Exercise on Intraocular Pressure, Choroidal Thickness and Axial Length

The Short-Term Effects of Exercise on Intraocular Pressure, Choroidal Thickness and Axial Length

The short-term influence of exercise on axial length and intraocular pressure

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

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