Abstract
The topography of a normal and a glaucomatous human papilla has been measured with several wavelengths of the luminous spectrum. The optical apparatus consists of a stereo ophthalmoscope and a laser fringe projector incorporated. The fringe projector images gratings with an extremely narrow line width onto a circular area of the fundus. The depth information carried by the position of the narrow fringes is evaluated in a stereocomparator. On the normal eye, a constant absolute depth difference of about 200 micrometer is found between blue (λ = 488 nm) and red (λ = 633 nm) light measurements. On the glaucomatous eye, the corresponding depth difference is 25 to 50 micrometer.
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