Measurement of the Z-transferfunction in the fovea centralis of the human eye using a new confocal laser scanning device

Stefan Goelz; Joerg P. Fischer; Ronald Klitsche; Josef F. Bille

doi:10.1117/12.168721

15 February 1994 Measurement of the Z-transfer function in the fovea centralis of the human eye using a new confocal laser scanning device

Stefan Goelz, Joerg P. Fischer, Ronald Klitsche, Josef F. Bille

Author Affiliations +

Proceedings Volume 2079, Laser Applications in Ophthalmology; (1994) https://doi.org/10.1117/12.168721
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

Abstract

A new method for the fast measurement of the Z-transferfunction in the Fovea Centralis of the human eye using a confocal laser scanning device is presented. The tested eye is illuminated by a collimated helium-neon laser beam and therefore focuses the light onto the retina. Reflected light is detected using confocal techniques, i.e. a pinhole in the detection unit assures that only light originating from the focal plane is sampled. The focus of the laser beam is scanned in 1-D along the visual axis of the eye through the regina by adding a slide defocus to the incoming beam. The Z-transferfunction can be obtained directly by measuring the intensity of the reflected light for different focal planes. A fixation target is offered to the eye at infinity to stabilize the accommodation as well as the direct viewing. Different pinholes in the detection unit are tested to investigate signal to noise ratio and depth resolution.

Citation Download Citation

Stefan Goelz, Joerg P. Fischer, Ronald Klitsche, and Josef F. Bille "Measurement of the Z-transfer function in the fovea centralis of the human eye using a new confocal laser scanning device", Proc. SPIE 2079, Laser Applications in Ophthalmology, (15 February 1994); https://doi.org/10.1117/12.168721

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