SYSTEM AND METHOD FOR SCANNING THE DEPTH OF THE OPTIC FUNDUS

摘要

A system and method for obtaining a depth profile of the fundus of the eye in which first and second alternately excited light sources image an aperture on a portion of the optic disk. The refractive power of the eye is held approximately constant by having the eye look at a fixation point. A detector is provided for sensing the degree of overlap of the aperture images due to the first and second light sources. In one embodiment the aperture is displaced in a Z-direction with respect to the eye until the images of the aperture completely overlap. The aperture is then successively displaced horizontally in an X-direction and/or vertically in a Y-direction with respect to the eye and in each position the aperture is adjusted in the Z-direction until the first and second images of the aperture completely overlap. The positions of the aperture where the first and second images thereof overlap correspond to the depth of the respective portions of the optic fundus from any arbitrary point at the front of the eye.