Pallor of the optic disc in glaucoma patients with artificial hypertension.

Measurement of four parameters, namely brightness of the unaffected optic disc, brightness of the optic disc under artificially elevated eye pressure, baseline eye pressure, and systolic blood pressure, gives the possibility of discerning glaucomatous eyes from healthy ones, with an accuracy of about 90%. Measuring eye pressure and systolic blood pressure is very simple. If measurement of the optical density could be simplified, an additional practical test for glaucoma could be developed.