Schiefer U, Ulrich C, Ulrich W D, Petzel C, Bernd A, Wilhelm H
Universitäts-Augenklinik Tübingen, Germany.
Graefes Arch Clin Exp Ophthalmol. 1994 Feb;232(2):115-21. doi: 10.1007/BF00171673.
In 11 (right) eyes of 11 ocularly healthy subjects an artificial stepwise intraocular pressure (IOP) elevation was applied by suction cup oculopression. The initial negative pressure in the suction cup was 80 mmHg; it was raised in steps of 40 mmHg. The median of the corneal astigmatism, measured with a Zeiss ophthalmometer, was 0.50 D before oculopression (the values of the 10th and 90th percentiles were 0.30 and 1.10 D, respectively). Corneal astigmatism increased to 2.00 (0.00-5.10) D, 2.25 (1.00-5.55) D, 2.63 (0.63-7.00) D, 3.38 (1.88-6.88) D, 3.38 (2.83-7.25) D, and 4.38 (2.85-5.63) D with 80, 120, 160, 200, 240, and 280 mmHg oculopression, respectively. The astigmatism dropped to 0.75 (0.00-2.30) D immediately after removal of the suction cup. Thus, suction cup oculopression not only influenced IOP but also ocular refraction. This is of particular importance since visual evoked potential (VEP) amplitude is to a high degree dependent on refractive changes. This fact has to be considered if changes in VEP amplitude during suction cup oculopression are used as a tolerance test in glaucoma diagnosis.
在11名眼部健康受试者的11只（右眼）眼中，通过吸盘眼压法人为地逐步升高眼压。吸盘中的初始负压为80 mmHg；以40 mmHg的步长升高。用蔡司眼压计测量的角膜散光中位数在眼压测量前为0.50 D（第10和第90百分位数分别为0.30和1.10 D）。随着眼压分别升至80、120、160、200、240和280 mmHg，角膜散光增加至2.00（0.00 - 5.10）D、2.25（1.00 - 5.55）D、2.63（0.63 - 7.00）D、3.38（1.88 - 6.88）D、3.38（2.83 - 7.25）D和4.38（2.85 - 5.63）D。吸盘移除后，散光立即降至0.75（0.00 - 2.30）D。因此，吸盘眼压法不仅影响眼压，还影响眼屈光。这一点尤为重要，因为视觉诱发电位（VEP）振幅在很大程度上取决于屈光变化。如果在青光眼诊断中使用吸盘眼压法期间VEP振幅的变化作为耐受性测试，则必须考虑这一事实。
