Analysis of water film thickness on contact lens by reflectometry technique

Michael R. Wang; Hui Lu; Jianhua Wang; Meixiao Shen

doi:10.1117/12.876333

4 February 2011 Analysis of water film thickness on contact lens by reflectometry technique

Michael R. Wang, Hui Lu, Jianhua Wang, Meixiao Shen

Proceedings Volume 7885, Ophthalmic Technologies XXI; 788503 (2011) https://doi.org/10.1117/12.876333
Event: SPIE BiOS, 2011, San Francisco, California, United States

Abstract

We report the use of optical reflectometry technique for evaluation of water film on contact lens. The water film can be measured through the spectral dependent reflectance evaluation, which is carried out by illuminating the contact lens with a white light and collecting the returning light with an optical fiber coupled to a spectrometer. Water film thinning process has been observed on different soft contact lenses and minimum measurable thickness is about 0.85 μm. The measurement is fast and accurate. The water film measurement can be valuable for contact lens design to improve its hydrophilic properties. The technique can be extended for the study of tear film dynamics in an eye.

Citation Download Citation

Michael R. Wang, Hui Lu, Jianhua Wang, and Meixiao Shen "Analysis of water film thickness on contact lens by reflectometry technique", Proc. SPIE 7885, Ophthalmic Technologies XXI, 788503 (4 February 2011); https://doi.org/10.1117/12.876333

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