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Proceedings Paper

Improving contact lens' fitting evaluation by digital image acquisition and processing
Author(s): Manuel F. M. Costa
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Paper Abstract

On this communication we describe a method of automated evaluation of the quality of hard contact lens' fitting on patient's eyes.

Traditionally, in order to check the fitting of a contact lens a fluorescein test is performed, either using a Burton or a slit lamp. The optometrist can get an idea of the fitting's quality simply by looking at the fluorescence at the contact lens' location, evaluating the "smoothness" of the color/brightness distribution. Depending on several factors including the optometrist's skills and experience, the test may take a couple of minutes making it very uncomfortable for the patient.

Our idea consists in automating this inspection process in an inexpensive, easy to implement and user friendly way. We simply propose the substitution of the optometrist's eye by a CCD camera. The camera will be suitably interfaced to a microcomputer. The eye's image can then be digitized and treated. Elementary image processing techniques will be applied. The enhancement of image's contrast and relevant feature's detection is performed. The processed images may simply be directly analyzed by the optometrist in an easier and more efficient way. An automatic diagnostic can also be made available.

Paper Details

Date Published: 1 September 1996
PDF: 2 pages
Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 2778E0 (1 September 1996); doi: 10.1117/12.2316193
Show Author Affiliations
Manuel F. M. Costa, Univ. do Minho (Portugal)


Published in SPIE Proceedings Vol. 2778:
17th Congress of the International Commission for Optics: Optics for Science and New Technology
Joon-Sung Chang; Jai-Hyung Lee; ChangHee Nam, Editor(s)

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