Sanborn G E, Friberg T R, Allen R
Arch Ophthalmol. 1987 Jun;105(6):774-6. doi: 10.1001/archopht.1987.01060060060033.
Inversion in a head-down position (gravity inversion) results in an intraocular pressure of 35 to 40 mm Hg in normal subjects. We used computerized static perimetry to measure the visual fields of normal subjects during gravity inversion. There were no visual field changes in the central 6 degrees of the visual field compared with the baseline (preinversion) values. However, when the central 30 degrees of the visual field was tested, reversible visual field defects were found in 11 of 19 eyes. We believe that the substantial elevation of intraocular pressure during gravity inversion may pose potential risks to the eyes, and we recommend that inversion for extended periods of time be avoided.
头低位倒置（重力倒置）会使正常受试者的眼压达到35至40毫米汞柱。我们使用计算机化静态视野计来测量正常受试者在重力倒置过程中的视野。与基线（倒置前）值相比，视野中央6度范围内没有视野变化。然而，当测试视野中央30度时，19只眼中有11只发现了可逆性视野缺损。我们认为重力倒置期间眼压的大幅升高可能会给眼睛带来潜在风险，因此建议避免长时间倒置。
