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Proceedings Paper

Knife-edge system for evaluating contact lenses
Author(s): Arthur Ho; Klaus Ehrmann
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Paper Abstract

With the increasing complexity of contact lens designs and the demand on visual performance required by wearers, the ability to assess the design and optical quality of a contact lens is an important capability. While more complex systems such as Hartmann-Shack devices exist, practitioners often call for a simple, quick and inexpensive system that can provide the above functions. A simple optical system based on modifying the knife-edge test has been developed for assessing design and optical quality. Incorporation of a Badal-type lens layout added lens power measurement capability. This system provides the practitioner with the ability to undertake rapid visual assessment of a contact lens's quality.

Paper Details

Date Published: 7 June 2000
PDF: 6 pages
Proc. SPIE 3908, Ophthalmic Technologies X, (7 June 2000); doi: 10.1117/12.387512
Show Author Affiliations
Arthur Ho, Univ. of New South Wales (Australia)
Klaus Ehrmann, Univ. of New South Wales (Australia)

Published in SPIE Proceedings Vol. 3908:
Ophthalmic Technologies X
Pascal O. Rol; Karen Margaret Joos M.D.; Fabrice Manns, Editor(s)

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