Comparison of Evaluation of Belin-Ambrosio indices and Rabinowitz criteria in refractive surgery candidates

Document Type : Original article

Authors

1 1. MSc. In Optometry, optometry department of rehabilitation faculty, Tehran University of Medical Science.

2 2. Ophthalmologist, Razi Eye Clinic, Tehran, Iran.

3 3. Associate professor of optometry department of rehabilitation faculty, Tehran University of Medical Science.

Abstract

Background and Aim: Meticulous preoperative screening is one of the key factors that contribute to success in refractive surgery. The purpose of this study was to evaluate the Belin-Ambrosio and Rabinowitz indices as screening methods before refractive surgery to distinguish keratoconus suspects from normal patients.
Materials and Methods: In this descriptive study, Pentacam data of 30 normal eyes (N) and 19 abnormal eyes with suspect keratoconus (KCS) were analyzed. Belin-Ambrosio and Rabinowitz indices were tested. Using SPSS Statistical Software (version17), an Independent T test was performed for statistical analysis.
Results: The mean age of patients was 25.51±3.97 years and the mean of myopia was
 -2.87±3.97 and the mean of astigmatism was -1.25±1.08 diopters.All tested variables had significant differences between N and KCS (Independent T-test, p< 0.001) except I-S value (p=0.22). The BAD-D and BAD-Dp had the greatest differences from Cutoff value.
Conclusion: The Belin-Ambrosio indices provide additional information in diagnosis of suspect keratoconus compared to Rabinowitz criteria. In this study, the BAD-D and BAD-Dp were better approaches for detecting keratoconus.
Key Words: Belin-Ambrosio indices, Rabinowitz criteria, Keratoconus, Pentacam

Keywords

References

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The Scientific Journal of Rehabilitation Medicine
Volume 3, Issue 3 - Serial Number 3
September and October 2014
Pages 19-25

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History

  • Receive Date: 04 November 2013
  • Revise Date: 09 April 2014
  • Accept Date: 06 June 2014
  • First Publish Date: 23 September 2014

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