Figure 1From: Relationship between visual field loss and contrast threshold elevation in glaucomaSchematic representation of optical apparatus used to generate vertical sinusoidal laser interference fringes which are observed in the Maxwellian view. Abbreviations: A aperture, B beam splitter, C interference filter, I iris diaphragm, L lens, M front silvered mirror, N neutral density filter, P polarizer, SF spatial filter. Further explanation is given in Methods.Back to article page