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First Author: A.Domínguez-Vicent SPAIN
Co Author(s): D. Monsálvez-Romín V. Sanchis A. del Águila R. Montés-Micó
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To study the interchangeability of different devices that measure anterior chamber depth (ACD) and white-to-white (WTW) distance.
University of Valencia, Spain.
Eighty right eyes of eighty patients aged from 20 to 40 were included in this study. Their spherical equivalent ranged from -0.50 to +0.50 diopters. While the ACD was measured using the Orbscan II, Pentacam HR and IOLMaster 500, the WTW distance was measured using the Castroviejo surgical caliper, CA-200F Corneal Analyser, Orbscan II, Pentacam HR and IOLMaster 500.
Mean ACD was 2.82ḟ0.32 mm using Orbscan II, 2.95ḟ0.29 mm using Pentacam HR and 2.85ḟ0.23 mm using IOLMaster 500. The comparative data analysis revealed that Pentacam HR measured significantly greater ACD (P<0.01) distances than the other two devices, whereas IOLMaster 500 and Orbscan II yielded comparable (P>0.01) ACD distances. Nonetheless, in every comparison the mean difference lied within clinically acceptable limits. Regarding mean WTW distance, the values measured with Castroviejo surgical caliper, CA-200F Corneal Analyser, Orbscan II, Pentacam HR and IOLMaster 500, were 11.77ḟ0.37 mm, 11.37ḟ0.52 mm, 11.68ḟ0.26 mm, 11.74ḟ0.37 mm and 12.02ḟ0.27 mm, respectively. The device comparison showed that for WTW distance measurements IOLMaster 500 yields the greatest value (P<0.01), whereas CA-200F Corneal Analyser yields the smallest one (P<0.01).
Pentacam HR, Orbscan II and IOLMaster 500 can be used interchangeably to measure ACD, whereas Pentacam HR, Orbscan II and Castroviejo surgical caliper can be considered as interchangeable when it comes to measuring WTW distance.