ISTANBUL escrs

Limbal relaxing incisions vs. toric lenses – a comparison of medical outcome with the help of the “Quality Index Bellevue” (QIB)

Session Details

Session Title: Refractive
Session Date/Time: Sunday 22/02/2015 | 08:30-11:00
Paper Time: 08:57
Venue: Sadirvan A
First Author: : J.Foerster GERMANY
Co Author(s): :    T. Herbst   D. Holland           

Abstract Details

Purpose:

Toric lenses are the main tool for treating astigmatism. Beside toric lenses, limbal relaxing incisions (LRI) are an alternative treatment method for correction of astigmatism, which were abandoned by most surgeons due to deficits in predictability and accuracy. With the introduction of the femtosecond laser in cataract surgery, accuracy and predictability of arcuate incisions were significantly improved. This study wants to compare the medical outcome of arcuate incisions performed with a femtosecond laser to toric lenses with the help of the “Quality Index Bellevue” (QIB), a self-developed measurement index for medical outcome in cataract surgery.

Setting:

The base for examinations is the “Quality Index Bellevue System”(Eye hospital Bellevue) which transfers each medical finding into a quality index and bases upon the German school grading system. Besides other outcome variables, patient satisfaction, visual acuity as well as refractive errors were compared pre- and postoperatively.

Methods:

Our choice of statistical methods depends on the level of measurement: For examinations on aggregate levels, we used ANOVA test as well as ordinary t-test. For comparisons of single finding QiBs, we came back to Mann-Whitney-test and Kruskal-Wallis test respectively because of ordinal scale levels. Further possible examinations will be realized by appropriate statistical methods.

Results:

Our first results show no significant differences for “QIB overall” as well as for subordinate QIBs (e.g. QIB visual acuity, QIB cylinder or QIB tonometry). Only “QIB cornea” shows slightly difference between both groups in favor of toric lenses. Nevertheless, differences were not found to be significant. Since our first results base on only 20 cases per group, further results may change due to the ongoing data collection.

Conclusions:

Beside toric lenses, limbal relaxing incisions (LRI) are possible treatment options for astigmatism corrections. Due to the introduction of femtosecond lasers in cataract surgery, “LRI” seem to be a serious alternative to toric lenses because of enhanced accuracy and predictability. The present study compares the medical outcome of toric lenses with those of LRI using the “Quality Index Bellevue”, a measurement index for medical outcome. First results show no significant differences for “QIB overall” as well as for subordinate QIBs. Since first results base on only 20 cases per group, further results may change due to the ongoing data collection.

Financial Disclosure:

NONE

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