Early keratoconus detection parameters, analysis in corneal topography OPD-Station and corneal tomography Pentacam systems

Session Details

Session Title: Imaging I

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

Paper Time: 14:30

Venue: Hall C2

First Author: : R.Donoso CHILE

Co Author(s): :    R. Flores   F. Pena   D. Aranguiz   N. Ruiz           

Abstract Details

Purpose:

To determine the detection parameters for early keratoconus (KC) in the Sheimpflug elevation corneal tomography (Pentacam™) and Placido's disk topography and aberrometer (OPD™).

Setting:

The study was conducted in Clínica Oftalmologíca Pasteur, Santiago de Chile.

Methods:

Case-control study. Placido's topographic and Sheimpflug tomographic indexes as well as aberrations parameters were compared between 2 groups of patients. Case group: included 52 eyes with incipient subclinical Placido's topographic KC, best corrected visual acuity of 20/20, normal back elevation difference at Belin-Ambrosio in Pentacam™ and advanced KC in in the fellow eye. Control group: included 90 eyes of normal eyes without any clinical, Placido's topography nor Sheimpflug tomography KC suspectious criteria. Severals parameters of OPD-Station™ and Pentacam™ exams were compared in both groups using Student t test and a statistical significance of p <0.05 was considered.

Results:

The following parameters and indexes were significatively different between both groups: For the OPD™: T coma, T trefoil, PVA, CEI, SAI, KPI, RMS, and Q. For the Pentacam™: Min anterior and posterior elevation, Max anterior and posterior elevation, PTL, IT, P. Index m. and Q.

Conclusions:

KC diagnosis is early better detected only by the identified parameters at OPD-Station™ and Pentacam™ and no by the posterior elevation difference.

Financial Disclosure:

NONE