Posters

Corneal biomechanics in early keratoconic eyes: should it be considered in the selection of refractive surgery candidates?

Poster Details

First Author: Z. Pniakowska POLAND

Co Author(s):    P. Jurowski                    

Abstract Details

Purpose:

To evaluate biomechanical parameters of the cornea, waveform score (WS), and intraocular pressure (IOP) as potentially useful adjuncts to the diagnostic algorithm for precise detection of the early keratoconus stages and selection of refractive surgery candidates.

Setting:

Department of Ophthalmology and Visual Rehabilitation, The University Clinical Hospital of Military Medical School- The Veterans Central Hospital, Lodz, Poland

Methods:

Patients enrolled in the study were diagnosed with refractive disorders. We assessed parameters of corneal biomechanics such as corneal hysteresis (CH), corneal resistance factor (CRF), Goldman‑correlated IOP (IOPg), corneal compensated IOP, WS, and keratoconus match index (KMI). They were classified into one of three groups based on the predefined KMI range: Group 1 (from 0.352 to 0.757) – 45 eyes, Group 2 (from −0.08 to 0.313) – 52 eyes, and Group 0 ‑ control group (from 0.761 to 1.642) – 80 eyes.

Results:

In both study groups, IOPg, CRF, and CH were decreased when compared to control (P < 0.0001). In the control group, there was a positive correlation between CH and KMI (P < 0.05), with no correlations in any of the two study groups. CRF correlated positively with KMI in control (P < 0.0001) and in Group 2 (P < 0.05).

Conclusions:

CH and CRF, together with WS and IOPg, consist a clinically useful adjunct to detect subclinical keratoconus in patients referred for refractive surgery when based on KMI staging.

Financial Disclosure:

NONE