Posters

Changes in visual acuity, refraction and pachymetry after cross-linking

Poster Details

First Author: S.Liduma LATVIA

Co Author(s):    E. Vavzika   F. Lukins   L. Karlsone   G. Krumina           

Abstract Details

Purpose:

This study was performed to evaluate the changes in visual acuity, refraction, and corneal thickness before and six months after cross-linking. It has been seen that subjects with lower keratoconus stage have better results after cross-linking. This is the first study which has analyzed cross-linking results depending on keratoconus stage. If we diagnose keratoconus in time, then we can make earlier cross-linking operation accordingly maintaining the corneal tissue in earlier keratoconus stage with better visual acuity. Now the collagen cross-linking operation with riboflavin and UVA is the best method to stop progression of keratoconus.

Setting:

In the study have been analyzed „Dr Lukin’s eye clinic” cross-linking operations patients’ records, Riga, Latvia.

Methods:

Totally there have been analyzed 49 eyes with first, second and third keratoconus stage (subjects age from 18 to 35 years) before and six months after treatment. We have determined changes in best subjective refraction before and six months after treatment, uncorrected visual acuity before and one month, three months and six months after treatment and corneal thickness before and six months after the treatment.

Results:

The first stage keratoconus subjects’ visual acuity improved by 0.17 decimal values, but second and third stages subjects’ visual acuity improved by 0.07 and 0.08. The mean spherical part of the eye’s subjective refraction was -1.01 ± 0.05 D and after six months it increased to -1.10 ± 0.05 D, the astigmatism before treatment was -2.78 ± 0.05 D and after six months it decreased to -2.49 ± 0.05 D, the spherical equivalent before treatment was -2.39 ± 0.06 D and after six month -2.35 ± 0.06 D. Corneal thickness reduced in all keratoconus stages by 7.6%, 6.5% and 9.3%.

Conclusions:

Our study has showed that all subjects had improvement in uncorrected visual acuity during six months after treatment in all keratoconus stages. It shows that the corneal collagen cross-linking treatment is an effective treatment to stop keratoconus progression in all keratoconus stages thereby it is the first choice for progressive keratoconus. Our study also presents if we set keratoconus diagnose early than cross-linking treatment not only stops but also improves visual acuity after the treatment.

Financial Disclosure:

None