Clinical relevance of radius of curvature error in corneal power measurements after excimer laser surgery

Giacomo Savini, Michele Carbonelli, Piero Barboni, Kenneth J. Hoffer

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To compare central and paracentral corneal curvature measurements after myopic excimer laser surgery performed using a large optical zone (OZ) (6.5 mm). Setting: Private practice. Methods: The mean simulated keratometry (SimK) value, average central power, corneal power of Placido rings 1 to 9 and the average central corneal power over the central 3.0 mm (ACCP3mm) were measured using a TMS-2 corneal topographer. Results: Forty-two patients (mean correction -5.0 diopters [D] ± 2.2 [SD]) were prospectively enrolled. The mean SimK value (38.82 D ± 1.95) and the mean average central power (38.89 ± 2.02 D) were not statistically significantly different, even when the sample was stratified according to the amount of induced correction (lower or higher than -5.00 D). The difference between the central and paracentral measurements was statistically significant when considering the ACCP3mm, whose mean value was lower than the SimK value in eyes with a myopic correction less than -5.00 D (mean 39.53 ± 1.92 D versus 39.67 ± 1.82 D) (P = .0013) and in eyes with a myopic correction greater than -5.00 D (37.64 ± 1.75 D versus 37.9 ± 1.69 D) (P

Original languageEnglish
Pages (from-to)82-86
Number of pages5
JournalJournal of Cataract and Refractive Surgery
Volume36
Issue number1
DOIs
Publication statusPublished - Jan 2010

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Surgery

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