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Quantitative anatomical differences in central corneal thickness values determined with scanning-slit corneal topography and noncontact specular microscopy.

Juan A Sanchis-Gimeno·Manuel Herrera·Antonio Lleó-Pérez·Luis Alonso·M S Rahhal·Francisco Martínez-Soriano
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Abstract

PURPOSE: This study was designed to analyze the differences in central corneal thickness values determined with noncontact specular microscopy and scanning-slit corneal topography. The measurements were performed on the same eye. METHODS: We analyzed the central corneal thickness values of 93 patients (n = 93) by means of noncontact specular microscopy (Topcon SP-2000P noncontact specular microscope, Topcon Corp., Tokyo, Japan) and scanning-slit corneal topography (Orbscan Topography System II, Orbscan Inc., Salt Lake City, UT). One experienced physician performed 3 consecutive central corneal thickness measurements with both devices. RESULTS: The central corneal thickness values obtained by means of Orbscan pachymetry were 17 +/- 2.7 (range, 12-24) microm greater. A significant correlation was observed between scanning-slit corneal topography and noncontact specular microscopy (Pearson correlation coefficient, r = 0.976; P < 0.001). CONCLUSIONS: Researchers should know of the existence of this difference between noncontact specular microscopy and Orbscan pachymetry when interpreting central corneal thickness values.

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AdultCorneaCorneal TopographyHumansMicroscopyProspective StudiesReference ValuesReproducibility of ResultsComparative StudyJournal ArticleResearch Support, Non-U.S. Gov't

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Juan A Sanchis-Gimeno, Manuel Herrera, Antonio Lleó-Pérez, Luis Alonso, M S Rahhal, Francisco Martínez-Soriano. 2006. Quantitative anatomical differences in central corneal thickness values determined with scanning-slit corneal topography and noncontact specular microscopy.. https://doi.org/10.1097/01.ico.0000176605.72129.2c

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