Objective detection of reversible deficiencies in glaucoma by means of BECP.

The dynamic properties of the VECP trigger mechanism are used as a functional test for the glaucomatous eye. A light-emitting diode is used as stimulator. The test was performed under the condition of the functional isolation of the red colour mechanism (by means of selective colour adaptation technique). In any case, a delayed rise of stimulus luminance causes a delay of the VECP. This delay increases in patients with glaucoma. After a successful glaucoma operation the VECP delay diminishes again.