عنوان مقاله [English]
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
Ambrosio R Jr, Alonso RS, Luz A, Coca Velarde LG. Corneal-thickness spatial profile and corneal-volume distribution: Tomographic indices to detect keratoconus. J Cataract Refract Surg 2006; 32(11):1851-9.