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Hiroaki Kanno, Akira Sawada, Tetsuya Yamamoto; The effect of the lateral decubitus position on intraocular pressure in normal volunteers. Invest. Ophthalmol. Vis. Sci. 2016;57(12):6431. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To explore the intraocular pressure (IOP) differences between right and left lateral decubitus positions (LDPs), and to examine the time course of IOP after keeping the posture in healthy subjects.
In 21 normal volunteers, the IOP was measured in the sitting position (SP) and the LDPs with an Icare rebound tonometer (Icare). In the first experiment, the IOPs in the right and left LDPs, and the SP were measured each 5 minutes after assuming these postures. In the second setting, after IOP measurement in the SP, the IOPs in the left LDP were measured 1,3,5,10,15 and 20 minute(s) after assuming this posture.
The mean age was 31.1 ± 2.3 years, and men included 14. The IOP with the Icare in the SP was 13.7 ± 2.9 mmHg in the right eye and 13.9 ± 3.3 mmHg in the left eye (P=0.380). Both in the right and left LDPs, the IOPs in both dependent and non-dependent eyes increased compared to them in the SP (each P<0.001). There were no significant differences in IOP between dependent right and left eyes (P=0.528), and between non-dependent right and left eyes (P=0.336). In the second experiment, the IOPs in both eyes significantly increased at 1 minute after changing to the LDP from the SP (P<0.001), and the increase in IOP persisted until the end of experiment (all time points versus baseline; P<0.001). In both dependent and non-dependent eyes, there were no significant differences between the IOP values measured at 10 minutes, and each IOP measured at 15 or 20 minutes after keeping the left LDP.
There was no significant difference in IOP between right and left LDP. The degree of postural IOP change was not significant for over 10 minutes after assuming the LDP.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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