Group index of the human cornea at 1.3-mµ wavelength obtained in vitro by optical coherence domain reflectometry

Roger C. Lin, Mark A. Shure, Andrew M. Rollins, Joseph A. Izatt, David Huang

Research output: Contribution to journalArticle

73 Scopus citations

Abstract

The group index of the cornea, rather than the phase refractive index, is required for thickness calculations with optical coherence tomography. Recent advances with high-speed optical coherence tomography at 1.3 mm make index measurement at this wavelength of great interest. Group indices of three human corneas from an eye bank were measured in vitro with optical coherence domain ref lectometry. Measurements were made in a calibrated cuvette filled with a preservation medium to maintain proper corneal hydration. Group indices were calculated from the optical path lengths measured. The corneal group index was 1.389 ± 0.004 (average ± standard deviation). The average group index of a balanced salt solution, an approximation to aqueous humor, was 1.343 ± 0.001.

Original languageEnglish (US)
Pages (from-to)83-85
Number of pages3
JournalOptics Letters
Volume29
Issue number1
DOIs
StatePublished - Jan 1 2004
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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