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Proceedings Paper

Keratoscope: a device for noncontact measuring the shape of the anterior corneal surface of the human eye
Author(s): Daniil T. Puryayev; Alexander V. Laskin
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Paper Abstract

To treat for some eye diseases by means of the modern methods of sight correction (microsurgical operation of keratotomy, contact lens fitting, etc.) it is necessary to know the exact shape of the anterior surface of a cornea (or the corneal topography). In order to use these methods successfully it is required that the optical power distribution be determined with the precision of 0.25 diopter. For this purpose at present special devices, keratoscopes, are usually used. A main disadvantage of these devices is a great sensitivity of measurement precision from displacements of eye relative to device. Therefore, in these keratoscopes the eye should be located relative to the apparatus very accurately, with the error less than 0.25 mm. This disadvantage decreases the possibilities of the keratoscopes. That is why the main problem of keratoscope designing is to eliminate the influence of eye alignment on the measurement precision.

Paper Details

Date Published: 24 June 1993
PDF: 10 pages
Proc. SPIE 1877, Ophthalmic Technologies III, (24 June 1993); doi: 10.1117/12.147521
Show Author Affiliations
Daniil T. Puryayev, Moscow Bauman State Technical Univ. (Russia)
Alexander V. Laskin, Moscow Bauman State Technical Univ. (Russia)

Published in SPIE Proceedings Vol. 1877:
Ophthalmic Technologies III
Jean-Marie A. Parel; Qiushi Ren, Editor(s)

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