Anterior chamber depth measurement in pseudophakic eyes: A comparison of pentacam and ultrasound

Giacomo Savini, Thomas Olsen, Claudio Carbonara, Sebastiano Pazzaglia, Piero Barboni, Michele Carbonelli, Kenneth J. Hoffer

Research output: Contribution to journalArticlepeer-review


PURPOSE: To compare the anterior chamber depth (ACD) measurements of a Scheimpflug camera (Pentacam, Oculus Optikgeräte GmbH) and immersion ultrasound biometry (UltraScan Imaging System, Alcon Laboratories) in pseudophakic eyes. METHODS: This prospective, multicenter study included three independent sample groups. The ACD, defined as the distance between the corneal epithelium and intraocular lens anterior surface, was assessed by ultrasound biometry. Two Pentacam ACD measurements were evaluated - the value automatically provided by the internal software and a manual measurement obtained by moving the software calipers on a single Scheimpflug image. RESULTS: For the comparison group (12 eyes), no significant difference between the mean ultrasound biometry and mean Pentacam manual measurement (4.51±0.34 mm and 4.50±0.34 mm, respectively, P>.05) was noted, whereas the mean automatic value was significantly higher (4.94±0.41 mm, P=.0002), as the posterior edge of the anterior chamber is erroneously identified as coinciding with the boundary of the posterior capsule. A strong correlation was found between Pentacam manual measurements and ultrasound biometry (r=0.98, P

Original languageEnglish
Pages (from-to)341-347
Number of pages7
JournalJournal of Refractive Surgery
Issue number5
Publication statusPublished - May 2010

ASJC Scopus subject areas

  • Ophthalmology
  • Surgery


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