Corneal biomechanics metrics in patients following DSAEK surgery compared with healthy eyes

Session Details

Session Title: Corneal Biomechanics

Session Date/Time: Sunday 15/09/2019 | 16:30-18:00

Paper Time: 17:12

Venue: Free Paper Forum: Podium 4

First Author: : K.Jadidi IRAN

Co Author(s): :    F. Nejat   S. Daryabari   S. Pirhadi                       

Abstract Details

Purpose:

To evaluate the corneal biomechanical properties following descemet stripping automated endothelial keratoplasty (DSAEK) surgery, compared to healthy eyes using Corneal Visualization Scheimpflug Technology (Corvis ST, Oculus).

Setting:

Vision Health research Center, Semnan University of medical sciences, Semnan, Iran

Methods:

This study included 22 eyes after DSAEK surgery and 20 healthy eyes. Thirty-three dynamic corneal response parameters provided by Corvis ST were measured in both groups.

Results:

The mean age of patients in DSAEK and control groups were 65.59 ± 10.27 and 54.40 ± 3.77 years old, respectively. Mean follow-up time in DSAEK group was 2.19 ± 1.85 years. The following parameters were significantly higher in DSAEK eyes than in the healthy eyes: highest concavity deformation amplitude (P=0.006), A1 deflection length (P=0.005), highest concavity deflection amplitude (P=0.036), maximum inverse radius (P=0.006), deformation amplitude ratio (2 mm) (P=0.048), integrated radius (P=0.003), stiffness parameter (SP-A1) (P=0.014) and Corvis biomechanical index (CBI) (P=0.046). Radius (P=0.001) and A1 time (P=0.019) variables were significantly lower after DSAEK compared to healthy eyes. .

Conclusions:

It was expected that rigidity of the cornea would improve with increasing eye thickness after DSAEK surgery, but changes in biomechanical parameters showed that corneal biomechanics has decreased.

Financial Disclosure:

None