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Journal of Biomedical Optics

Dual interferometer for dynamic measurement of corneal topography
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Paper Abstract

The cornea is the anterior most surface of the eye and plays a critical role in vision. A thin fluid layer, the tear film, coats the outer surface of the cornea and serves to protect, nourish, and lubricate the cornea. At the same time, the tear film is responsible for creating a smooth continuous surface, where the majority of refraction takes place in the eye. A significant component of vision quality is determined by the shape of the cornea and stability of the tear film. A dual interferometer system for measuring the dynamic corneal topography is designed, built, verified, and qualified by testing on human subjects. The system consists of two coaligned simultaneous phase-shifting polarization-splitting Twyman–Green interferometers. The primary interferometer measures the surface of the tear film while the secondary interferometer tracks the absolute position of the cornea, which provides enough information to reconstruct the absolute shape of the cornea. The results are high-resolution and high-accuracy surface topography measurements of the

Paper Details

Date Published: 31 August 2016
PDF: 19 pages
J. Biomed. Opt. 21(8) 085007 doi: 10.1117/1.JBO.21.8.085007
Published in: Journal of Biomedical Optics Volume 21, Issue 8
Show Author Affiliations
Jason D. Micali, College of Optical Sciences, The Univ. of Arizona (United States)
John E. Greivenkamp, College of Optical Sciences, The Univ. of Arizona (United States)


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