J Korean Ophthalmol Soc.  2011 Jan;52(1):53-59. 10.3341/jkos.2011.52.1.53.

Comparison and Repeatability of Anterior Segment Parameters Obtained by Galilei and Slit-lamp Optical Coherence Tomography

Affiliations
  • 1Department of Ophthalmology, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
  • 2Department of Ophthalmology, The Armed Forces Capital Hospital, Seongnam, Korea. brainh@hanmail.net
  • 3Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea.

Abstract

PURPOSE
To evaluate the repeatability and comparability of anterior chamber depth (ACD) and central corneal thickness (CCT) measurements obtained by Galilei dual Scheimpflug analyzer (Ziemer, Port, Switzerland) and slit-lamp optical coherence tomography (SL-OCT; Heidelberg Engineering, Dossenheim, Germany).
METHODS
ACD and CCT were measured by Galilei and SL-OCT in 68 eyes of 68 healthy young subjects. Each measurement was performed 3 times by a single examiner, and the repeatability of 3 consecutive measurements was analyzed. ACD and CCT measurements were compared between the 2 devices.
RESULTS
Both Galilei and SL-OCT showed high repeatability (ICCs > or = 0.994) for ACD and CCT measurements. The mean ACD and CCT measured by Galilei were greater than SL-OCT measurements by 0.11 +/- 0.09 mm and 14.01 +/- 7.38 microm, respectively. The 95% limit of agreement values for ACD and CCT measurements were 0.36 mm, 27.66 microm, respectively, and were highly correlated (correlation coefficients > or = 0.89, p < 0.001).
CONCLUSIONS
Although the repeatability of each device was high, ACD and CCT obtained by Galilei and SL-OCT were significantly different. These differences should be considered when interpreting ACD and CCT measurements obtained by the 2 devices.

Keyword

Anterior chamber depth; Central corneal thickness; Galilei dual Scheimpflug analyzer; Slit-lamp optical coherence tomography

MeSH Terms

Anterior Chamber
Eye
Tomography, Optical Coherence
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