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Yi Zhen, Ningli Wang, JIngwen Ding, Jie Hao; Influences Of Sleep Posture On The Intraocular Pressure. Invest. Ophthalmol. Vis. Sci. 2011;52(14):3444.
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To observes the IOPs in different sleep postures and discuss its influence on the IOP.
Thirty eyes of 32 patients with POAG and thirty eyes of 28 normal people. The IOPs in sitting, supine, right-lateral and left-lateral position were measured by the Perkins applanation tonometer. Then the participants were asked to sit up again and the IOPs within 1 minute, at 5 and 10 minutes after re-sitting were measured by the same tonometer.
In normal people, the IOPs of right eyes under the sitting, supine, right-lateral position and left-lateral position were 17.5±3.8,19.3±3.1,21.7±3.7 and 21.5±3.7mmHg. The IOPs of left eyes under above four postures were 18.4±3.0,19.3±3.1,20.7±2.9 and 22.8±4.0 mmHg separately. In POAG group, the IOPs of right eyes under the sitting, supine, right-lateral position and left-lateral position were 17.9±3.7,20.6±4.6, 26.1±7.1 and 26.3±5.9 mmHg. The IOPs of left eyes under above mentioned postures were 18.2±3.6,20.0±4.1,25.6±6.1 and 25.7±6.0mmHg. IOPs under the right- and left-lateral were higher than that in sitting and supine in both groups. The IOP increases under later position of POAG were significant higher than normal people. The IOP decreased rapidly after re-sitting. The IOPs at 1 minute, 5minutes and 10minutes after re-sitting were no significantly differences with the IOPs before lying down.
The IOP in lateral position is significantly higher than the IOP in sitting and supine. This phenomenon is more obvious in POAG. These results suggest that glaucoma patients should sleep in supine to avoid the IOP elevating caused by lateral position.
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