Comparison of A-scan, Scheimpflug Camera, and Orbscan for Measurement of Anterior Chamber Depth
Journal of the Korean Ophthalmological Society
;
: 1287-1291, 2006.
Article
in Korean
| WPRIM
| ID: wpr-103813
ABSTRACT
PURPOSE:
To assess the reproducibility and reliability of the A-scan, Scheimpflug camera and Orbscan Topography system in measuring anterior chamber depth (ACD)METHODS:
In this prospective study of 207 eyes of 150 patients, ACD estimation prior to cataract surgery was done by threeMETHODS:
A-scan, Scheimpflug camera, and Orbscan (in that order). One observer performed all measurements three times for each test. ACD was defined as the length between the center of anteror surface of cornea and the center of anterior lens surface.RESULTS:
The mean ACD by the three methods were 2.86+/-0.46 mm, 3.22+/-0.46 mm, and 3.13+/-0.44 mm, respectively the differences were statistically significant (P<0.01). The correlation coefficient between Scheimpflug camera and Orbscan was 0.93. The coefficient of variation for the three methods were 3.20% in the A-scan, 1.34% in the Scheimpflug camera, and 0.84% with Orbscan.CONCLUSIONS:
Applanation A-scan gives lower measurements for ACD compared with Scheimpflug and Orbscan. There was good agreement between results obtained with the latter 2 methods based on optical principles. Orbscan had the best reproducibility of results among the three methods.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Cataract
/
Prospective Studies
/
Reproducibility of Results
/
Cornea
/
Anterior Chamber
Type of study:
Observational study
Limits:
Humans
Language:
Korean
Journal:
Journal of the Korean Ophthalmological Society
Year:
2006
Type:
Article
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