Repeatability of Pentacam peripheral corneal thickness measurements

Raul Martin, Sven Jonuscheit, Ana Río-Cristóbal, Michael Doughty

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Purpose: To assess the repeatability of corneal thickness (CT) measurements, along the horizontal meridian up to 5. mm from centre, in healthy eyes with the Pentacam instrument. Methods: CT was measured in 82 right eyes (82 healthy subjects) at 11 corneal locations nominally 1. mm apart along the horizontal meridian with Scheimpflug topography Pentacam. Two consecutive scans were performed in quick succession. The repeatability of CT was determined by assessing differences between measurements and calculating the coefficient of variation (CV). The relative repeatability (difference) was calculated as the ratio of the absolute peripheral CT difference to the central thickness. A variant of Bland-Altman analysis was carried out to determine the effect of the overall magnitude of CT on the absolute and relative differences. Results: Mean CT (μm) at the temporal 5. mm location was 770 ± 51 and 823 ± 56 μm at the corresponding nasal location; central CT was 554 ± 36 μm Good repeatability (CV.
Original languageEnglish
Pages (from-to)424-429
Number of pages6
JournalContact Lens and Anterior Eye
Issue number6
Early online date11 Jun 2015
Publication statusPublished - 1 Dec 2015


  • Human cornea
  • Pentacam
  • Peripheral corneal thickness
  • Repeatability
  • Scheimpflug pachymetry


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