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.

Date Published: 7 June 2000
PDF: 6 pages
Proc. SPIE 3908, Ophthalmic Technologies X, (7 June 2000);

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