Comparative analysis of anterior segment parameters generated by Scheimpflug tomography in normal corneas and subclinical keratoconus

Session Details

Session Title: Imaging I

Session Date/Time: Monday 12/09/2016 | 14:30-16:30

Paper Time: 14:48

Venue: Hall C2

First Author: : J.Soundarapandian INDIA

Co Author(s): :    S. Karuppasamy   N. Madhivanan   N. Madhivanan              

Abstract Details

Purpose:

The purpose of our study was to evaluate and compare the anterior and posterior corneal surface parameters, keratoconus indices, thickness profile data, and data from enhanced elevation maps of keratoconic and normal corneas with the Pentacam Scheimpflug corneal tomography and to determine the sensitivity and specificity of these parameters in discriminating Subclinical keratoconus from normal eyes.

Setting:

Study done at refractive surgery clinic

Methods:

Study included 104 healthy and 104 keratoconic eyes. 40 parameters obtained from the Pentacam were assessed by the ROC curve analysis and the ability of these corneal elevation measurements in discriminating normal and subclinical keratoconus was assessed.

Results:

ROC analyses showed excellent predictive accuracy (AUROC, ranging 0.914 to 0.972)for 21 of the 40 parameters evaluated. Among all parameters indices of vertical asymmetry, KI, front and back elevation at thinnest location, deviation of average pachymetric progression, and total deviation showed excellent (>90%) sensitivity and specificity.

Conclusions:

Parameters derived from the topometric and BAD maps very effectively discriminate Subclinical keratoconus from normal corneas with excellent sensitivity and specificity.

Financial Disclosure:

NONE