Change in Intraocular Pressure of Normal Healthy Eyes During Sit-up With Various Postures.

Hong, Young Taek; Hong, Samin; Kim, Chan Yun; Seong, Gong Je

doi:2009.50.12.1860

J Korean Ophthalmol Soc > Volume 50(12); 2009 > Article

Original Article

Journal of the Korean Ophthalmological Society 2009;50(12):1860-1867.
DOI: https://doi.org/10.3341/jkos.2009.50.12.1860 Published online December 15, 2009.

Change in Intraocular Pressure of Normal Healthy Eyes During Sit-up With Various Postures.

Young Taek Hong, Samin Hong, Chan Yun Kim, Gong Je Seong

The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea. gjseong@yuhs.ac

정상인의 체위에 따른 윗몸일으키기 시행 중 안압측정

홍영택ㆍ홍사민ㆍ김찬윤ㆍ성공제

The Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea

Abstract

PURPOSE
To investigate the change in intraocular pressure (IOP) of normal healthy eyes at different positions while performing sit-ups. METHODS: Twenty normal healthy eyes of 20 subjects were studied. IOP was measured while in the 'sitting upright', 'supine', and 'head-down' position to determine postural effect on IOP when executing a sit-up. Measurements were taken after the performance of a sit-up and during the performance of a sit-up, in both the head up and head down positions to test the effect of the exercise on the IOP. In addition, the IOP after an 'isometric exercise with Valsalva's maneuver in the supine or head-down position' was measured to determine the actual IOP during a sit-up. RESULTS: The postural change from sitting upright to tilting the head in a downward position caused the IOP to increase. After the performance of a sit-up, the IOP decreased in both the upright and supine positions, though IOP increased in the head-down position. After the isometric exercise with Valsalva's maneuver, IOP increased significantly regardless of position. CONCLUSIONS: IOP increased significantly during sit-ups, but decreased afterward. Future studies should be performed to evaluate the long-term effects of IOP change during and after sit-ups with respect to the prognosis of glaucoma.

Key Words: Head down;Intraocular pressure;Posture