Interferometric measurement of the refractive error of the eye

Henning Stiller; Ulrich Oechsner; Bernhard Rassow

doi:10.1117/12.167413

1 February 1994 Interferometric measurement of the refractive error of the eye

Henning Stiller, Ulrich Oechsner, Bernhard Rassow

Proceedings Volume 2083, Microscopy, Holography, and Interferometry in Biomedicine; (1994) https://doi.org/10.1117/12.167413
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

Abstract

A Michelson interferometer is used to determine the refractive error of the eye. A coherent infrared point source radiates into the eye; at the fundus the light is scattered. The light wave emerging from the eye depends on its refractive error. The wave is analyzed by means of the interferogram which results from superposing a reference light wave. The refractive error is determined in two steps: (1) Speckle size is enlarged by moving the point source towards the plane conjugate with the eye's fundus. (2) Interference fringes which appear when speckle size exceeds fringe intervals are evaluated by Fourier analysis after suitable transformation of coordinates.

Citation Download Citation

Henning Stiller, Ulrich Oechsner, and Bernhard Rassow "Interferometric measurement of the refractive error of the eye", Proc. SPIE 2083, Microscopy, Holography, and Interferometry in Biomedicine, (1 February 1994); https://doi.org/10.1117/12.167413

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