A model for predicting sulcus-to-sulcus diameter in posterior chamber phakic intraocular lens candidates: correlation between ocular biometric parameters

Session Details

Session Title: Biometry & Quality of Vision

Session Date/Time: Tuesday 25/09/2018 | 08:00-10:30

Paper Time: 08:48

Venue: Room A2

First Author: : M.Ghoreishi IRAN

Co Author(s): :    M. Abdi-Shahshahani   A. Peyman   M. Pourazizi              

Abstract Details

Purpose:

The aim of this study was to determine the correlation between ocular biometric parameters and sulcus-to-sulcus (STS) diameter

Setting:

PARSIAN EYE CLINIC, Private clinic, Isfahan, Iran.

Methods:

This was a cross-sectional study of preoperative ocular biometry data of patients who were candidates for phakic intraocular lens (IOL) surgery. Subjects underwent ocular biometry analysis, refraction evaluation using an autorefractor and Orbscan topography for white-to-white (WTW) corneal diameter measurement. Pentacam was used to perform WTW corneal diameter and measurements of minimum and maximum keratometry (K). Measurements of STS and angle-to-angle (ATA) were obtained using a 50-MHz B-mode ultrasound device. Anterior optical coherence tomography was performed for anterior chamber depth measurement. Pearson’s correlation test and stepwise linear regression analysis were used to find a model to predict STS.

Results:

Fifty-eight eyes of 58 patients were enrolled. Mean age ± standard deviation of sample was 28.95 ± 6.04 years. The Pearson’s correlation coefficient between STS with WTW, ATA, mean Kwas 0.383, 0.492, and − 0.353, respectively, which was statistically significant (all P < 0.001). Using stepwise linear regression analysis, there is a statistically significant association between STS with WTW (P = 0.011) and mean K (P = 0.025). The standardized coefficient was 0.323 and − 0.284 for WTW and mean K, respectively. The stepwise linear regression analysis equation was: (STS = 9.549 + 0.518 WTW − 0.083 mean K).

Conclusions:

The results of our study demonstrated the ability of the WTW diameter and mean K to predict STS diameter in Iranian adult populations. Since there is a statistically significant linear correlations between STS diameter with WTW diameter and mean K, measuring WTW diameter and mean K using Pentacam, could be consider as an alternative method of validating anterior segment dimensions currently.

Financial Disclosure:

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