Corneal power measurement with Fourier-domain optical coherence tomography

Research output: Contribution to journalArticle

67 Citations (Scopus)

Abstract

Purpose: To study the accuracy and repeatability of anterior, posterior, and net corneal power measured by Fourier-domain optical coherence tomography (OCT). Setting: Doheny Eye Institute, Los Angeles, California, USA. Design: Cross-sectional study. Methods: A Fourier-domain OCT system (RTVue) was used to scan normal eyes, eyes after myopic laser in situ keratomileusis (LASIK), and keratoconic eyes. After the corneal surfaces were delineated, the system calculated anterior and posterior corneal powers by curve fitting over the central 3.0 mm diameter area. Net corneal power was calculated using a thick-lens formula. The repeatability of the calculations was evaluated by the pooled standard deviation of 3 measurements from the same visit. The net corneal power values were compared with standard automated keratometry measurements (IOLMaster). Results: The repeatability of Fourier-domain OCT net corneal power was 0.19 diopters (D), 0.26 D, and 0.30 D in the normal, post-LASIK, and keratoconus groups, respectively. The Fourier-domain OCT net corneal power was significantly lower than keratometry by a mean of -1.21 D, -2.89 D, and -3.07 D, respectively (P

Original languageEnglish (US)
Pages (from-to)2115-2122
Number of pages8
JournalJournal of Cataract and Refractive Surgery
Volume36
Issue number12
DOIs
StatePublished - Dec 2010
Externally publishedYes

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Optical Coherence Tomography
Laser In Situ Keratomileusis
Keratoconus
Los Angeles
Lenses
Cross-Sectional Studies

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Surgery

Cite this

Corneal power measurement with Fourier-domain optical coherence tomography. / Tang, Maolong; Chen, Alex; Li, Yan; Huang, David.

In: Journal of Cataract and Refractive Surgery, Vol. 36, No. 12, 12.2010, p. 2115-2122.

Research output: Contribution to journalArticle

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