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Comparative Study
. 2005 Jan-Feb;68(1):71-4.
doi: 10.1590/s0004-27492005000100012. Epub 2005 Mar 30.

[Reliability of corneal thickness measurements by Orbscan II and ultrasound pachymeter]

[Article in Portuguese]
Adamo Lui Netto  1 , João Baptista Nigro Santiago Malta, Maurício Arruda Câmara Barros, Renato Giovedi Filho, Milton Ruiz Alves
Affiliations
Free article
Comparative Study

[Reliability of corneal thickness measurements by Orbscan II and ultrasound pachymeter]

[Article in Portuguese]
Adamo Lui Netto et al. Arq Bras Oftalmol. 2005 Jan-Feb.
Free article

Abstract

Purpose: To access the reliability of corneal thickness measurements by Orbscan II and ultrasound pachymeter.

Methods: A retrospective study of 134 eyes from 67 normal subjects between January and June 2001 was obtained. Sex, age, visual acuity, refractive error and corneal thickness measurements by Orbscan II and ultrasound pachymetry were evaluated. All results were analyzed by the paired t test (p<0.05).

Results: Sixty-seven subjects, 34 (50.7%) female and 33 (49.3%) male, with a mean age of 32.44+/-9.98 were evaluated. The mean of spherical equivalent was -2.68+/-2.62. The mean corneal thickness was 534.81+/-34.45 with the Orbscan II system and 535.00+/-29.53 with the ultrasound pachymeter, values that were not significantly different (p=0.8922). The correlation coefficient between both instruments was 0.8774, and it is effective.

Conclusions: Both methods are similar showing good correlation. In this study, the Orbscan II showed reliability, and this tool is extremely useful to evaluate subjects regarding refractive surgery.

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