London 2014 Registration Visa Letters Programme Satellite Meetings Glaucoma Day 2014 Exhibition Hotel Booking Virtual Exhibition Star Alliance
london escrs

Course handouts are now available
Click here


Come to London

video-icon

WATCH to find out why


Site updates:

Programme Updates. Programme Overview and - Video Symposium on Challenging Cases now available.


Posters

Search Abstracts by author or title
(results will display both Free Papers & Poster)

Very high astigmatism outcomes with PRK and LASIK

Poster Details

First Author: A.Wallerstein CANADA

Co Author(s):    X. Liu   E. Adiguzel   M. Cohen        

Abstract Details



Purpose:

To determine the accuracy, efficacy, safety, and stability of laser vision correction (LVC) for high astigmatism greater than -5 D.

Setting:

Multi-clinic national laser refractive surgery centre

Methods:

Retrospective chart review of eyes with greater than -5 D cylinder. All eyes underwent aspheric PRK or LASIK targeting emmetropia. 6 month or greater postop manifest refraction, UDVA and CDVA were compared to preop measurements. RM-ANOVA with Holms- Sidak post hoc tests and vector analysis (VA) were performed.

Results:

208 eyes, with a preop sphere of 0.82±2.32 D (-6.75 to +5.50D) and cyl of 5.89±0.77D (-5.00 to -7.75D). 88 eyes had a postop of 6+ months, with mean FU 12.9±5.8 months. Achieved postop sphere of +0.08±0.48D ( -1.50 to +1.25D), cyl of -0.67±0.53 D (0 to -2.25D). 46, 73, 98% within ±0.25, ±0.50, ±1.00D. Cumulative UDVA of 20/20, 20/25, 20/40 in 34, 65, 94%, with respective preop CDVA in 48, 82, 98%; efficacy index 0.9±0.2. 2 lines CDVA loss in 1%, 1 line in 5%, no change in 55%, and gain of ≥1 lines in 39%. No loss of >2 lines; safety index of 1.1±0.2. MRSE stable. 30 (14%) had retreat. VA: correction ratio 0.95±0.10, error ratio 0.11±0.08, axis shift -3.2±36.7°. Error of magnitude and axis 0.32±0.62D and -0.44±2.65°.

Conclusions:

LVC for very high astigmatism (greater than -5 D) has excellent accuracy, efficacy, and safety profiles. Vector analysis demonstrated a high degree of precision in treating these highly astigmatic eyes. FINANCIAL INTEREST: NONE

Back to Poster listing