|
مقاله
|
Abstract
|
|
|
|
Title:
|
Effects of corneal collagen cross-linking on ocular aberrations and contrast sensitivity in patients with keratoconus
|
|
Author(s):
|
Siamak Zarei-Ghanavati1; MD, FICO, Hamid Khakshoor1; MD, Amir-Hossein Vejdani2, MD
|
|
Presentation Type:
|
Oral
|
|
Subject:
|
Cornea and Anterior Segment
|
|
Others:
|
|
|
Presenting Author:
|
|
|
Name:
|
Siamak Zarei ghanavati
|
|
Affiliation :(optional)
|
Mashhad University of Medical Sciences
|
|
E mail:
|
sizagh@yahoo.com
|
|
Phone:
|
0511-7659461
|
|
Mobile:
|
09151153024
|
|
|
|
|
Purpose:
|
To determine changes in higher –order aberrations (HOAs) and contrast sensitivity after collagen crosslinking (CXL).
|
|
Methods:
|
Twenty two eyes of eleven patients with keratoconus underwent CXL. Uncorrected distance visual acuity (UDVA),best spectacle–corrected visual acuity (BSCVA), contrast sensitivity test (Pelli Robson) and higher-order aberrations (ZyWave) before and 1, 3, 6 and 8 months after CXL, were measured.
|
|
Results:
|
The mean total HOA in 22 eyes of eleven patients with keratoconus underwent CXL, were measured 2.24, 2.34, 2.28, 2.17 and 2.03 micrometer in before and 1, 3, 6 and 8 months after CXL, respectively (p<0.01; except for 3rd month). Decreasing in other HOAs including vertical coma, horizontal coma, vertical trefoil, horizontal trefoil and Spherical Aberration observed in 6 and 8 months after CXL which except horizontal coma, all were significant (p<0.01). UCVA and BSCVA increased significantly in all months after CXL in proportion of before CXL (p<0.001). Although mean contrast sensitivity declined significantly, improved significantly in 3rd, 6th and 8th months (p<0.00001).
|
|
Conclusion:
|
CXL is not only efficacious in inhibiting the progression of keratoconus but also can improve contrast sensitivity and decrease HOAs except horizontal coma.
|
|
Attachment:
|
|
|