Robert Y, Niesel P, Ehrengruber H
Graefes Arch Clin Exp Ophthalmol. 1982;219(4):176-82. doi: 10.1007/BF02156843.
The pallor of the optic disc during acute raise of intraocular pressure can be shown on the negatives of orthochromatic film and is measured by a photoscanner. When raising intraocular pressure from normal values to ablut 40 mm Hg, ten young persons showed an increase in optical density from 0.28 log units +/- 0.04 SEM to 0.38 log units +/- 0.04 SEM. When raising IOP to 65 mm Hg, the optical density was 0.43 log units +/- 0.04; with 110 mm Hg the optical density was 0.44 log units +/- 0.04 SEM. Above values of 40 mm Hg IOP, the pallor does not remain constant but may also decrease in some cases. The higher the intraocular pressure, the more contradictory the response. The phenomenon may be shown on various parts of the rim simultaneously. The amount of maximum pallor is directly related to the value of optical density with normal intraocular pressure. After restoring IOP to normal values, optical density decreases again, the amount of decrease being related to initial value. The contradictory response with higher IOP may be due to autoregulation of the capillaries of the optic nerve head.
在眼内压急性升高时视盘的苍白可在正色片的底片上显示出来，并可用光扫描器进行测量。当眼内压从正常值升高到约40毫米汞柱时，十名年轻人的光密度从0.28对数单位±0.04标准误增加到0.38对数单位±0.04标准误。当眼内压升高到65毫米汞柱时，光密度为0.43对数单位±0.04；当眼内压为110毫米汞柱时，光密度为0.44对数单位±0.04标准误。眼内压高于40毫米汞柱时，苍白并非保持不变，在某些情况下还可能降低。眼内压越高，反应越矛盾。这种现象可同时出现在视盘边缘的各个部位。最大苍白程度与正常眼内压时的光密度值直接相关。眼内压恢复到正常值后，光密度再次降低，降低的幅度与初始值有关。眼内压较高时的矛盾反应可能是由于视神经乳头毛细血管的自动调节所致。
