Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


escrs app advert yo advert

Dynamic Scheimpflug-based imaging (Corvis ST) for evaluation of corneal biomechanical changes after corneal collagen cross-linking in keratoconus

Search Title by author or title

Session Details

Session Title: Presented Poster Session: Corneal Biomechanics

Session Date/Time: Saturday 10/09/2016 | 15:00-16:30

Paper Time: 16:10

Venue: Poster Village: Pod 4

First Author: : M.Khalili IRAN

Co Author(s): :    S. Jahadi Hosseini   A. Hamid           

Abstract Details


To assess in vivo the changes in biomechanical properties of cornea by using CorVis ST device after treatment of keratoconus patients with UV-A/ riboflavin corneal collagen cross-linking (CXL).


Prospective observational case series


Thirty seven eyes from 37 consecutive patients with progressive keratoconus were enrolled. CorVis ST was used and corneal biomechanical parameters were recorded at baseline, 3 months and 1 year after CXL. Assessed CorVis ST corneal biomechanical parameters were the length of the applanated cornea (L1, L2), and corneal movement velocity during applanation (V1, V2) at the moment of first and second applanations, deformation amplitude (DA), distance between bending points of the cornea (PD), and concave radius of curvature (R) at the point of highest concavity. Pretreatment and post-treatment variables were recorded and analyzed using SPSS version 21.


The mean age of patients was 23.27 .Among CorVis ST corneal biomechanical parameters, A1 length, deformation amplitude, PD, and concave radius of curvature at the point of highest concavity did not change significantly. Length of the applanated cornea at the moment of second applanations (L2) showed a significant change three month after CXL; but no significant difference was seen between three month and one year values of this parameter. Corneal movement velocity during applanation (V1 and V2) did not change three month after doing CXL but the change in these parameter was significant one year after CXL.


Although CorVis ST device may demonstrate changes in some biomechanical properties of cornea after treatment of keratoconus patients with CXL, many parameters remain unchanged and this device cannot readily be used to document the effects of CXL. Further improvements in computation of relevant CorVis ST Parameters are needed.

Financial Disclosure:


Back to previous