Abstract
A method of measuring the tear film thickness is described in which interference causes oscillations in the reflectance spectrum from the tears. Strong oscillations were usually observed when a contact lens was worn. Measurement of modulation and phase of these oscillations confirmed that they were associated with the tear layer in front of the contact lens. Calculated thickness of this layer averaged 2.7 µm. In one out of five subjects, weak oscillations were sometimes observed without a contact lens. These oscillations probably arose from the aqueous layer of the tears with a thickness of The relative merits of three interference methods of measuring the tear film are discussed.
© 1998 Optical Society of America
Full Article | PDF ArticleMore Like This
P. Ewen King-Smith, Barbara A. Fink, Jason J. Nichols, Kelly K. Nichols, and Richard M. Hill
J. Opt. Soc. Am. A 23(9) 2097-2104 (2006)
Valentin Aranha dos Santos, Leopold Schmetterer, Martin Gröschl, Gerhard Garhofer, Doreen Schmidl, Martin Kucera, Angelika Unterhuber, Jean-Pierre Hermand, and René M. Werkmeister
Opt. Express 23(16) 21043-21063 (2015)
Jinxin Huang, Qun Yuan, Buyun Zhang, Ke Xu, Patrice Tankam, Eric Clarkson, Matthew A. Kupinski, Holly B. Hindman, James V. Aquavella, Thomas J. Suleski, and Jannick P. Rolland
Biomed. Opt. Express 5(12) 4374-4386 (2014)