Refractive stability with and without capsular tension rings for two designs of FineVision Trifocal IOL

Session Details

Session Title: Presbyopia Correction

Session Date/Time: Tuesday 13/09/2016 | 16:00-18:00

Paper Time: 17:24

Venue: Auditorium A

First Author: : B.Gjerdrum NORWAY

Co Author(s): :    E. Stoele                    

Abstract Details

Purpose:

The purpose of this work was to study stability and predictability of the refractive result with Fine Vision Trifocals and possible improvement in using Capsular Tension Rings(CTR)

Setting:

Private refractive surgery clinic; Memira in Stavanger, Norway.

Methods:

The study involved a consecutive series of 342 eyes from 171 patients undergoing RLE surgery in the period from April 2014 to December 2015 with the implantation of Fine Vision Trifocal IOLs from Physiol. Two different designs of haptic of the lens was used: FineVison Micro F (non-toric) and FinVision Pod TFT (Toric). Power calculation according to Haigis formula. 178 eyes were implanted without CTR, 164 Eyes were implanted with CTR. Surgery was done according to Memira standard procedures. Refractive result and stability at 1-3 weeks and 2-3 months was compared for the two lens designs with and without CTR.

Results:

For the MicroF Design the best refractive stability was found in the CTR group and (n=87) the poorest stability in the non-CTR group (n=88), with an average change in refraction of +0,23(st.dev 0,30) and +0,28(st.dev 0,28) respectively. Predictability of refraction (difference from calculated target) was almost identical; -0,02 (st.dev 0,38) for CTR group and -0,03 (st.dev 0,37) for the non-CTR group. For The Pod Design the best refractive stability was found in the non-CTR group(n=58) and the poorest stability in the CTR group (n=63) with an average change in refraction of +0,26 (st.dev 0,31) and +0,32 (st.dev 0,39) respectively. Predictability of refraction was highest in the non-CTR group (+0,26, Stdev 0,43) and lowest for the CTR group (+0,34 , St.dev 0,43).

Conclusions:

FineVision Trifocals of both Micro F and Pod design shows a hyperopic shift of about 1/4D in refraction from 2 weeks to three months after surgery. Use of CTR give only a slight improvement (0,05D) for the Micro F design and is probably not worthwhile. For the Pod Design the refractive stability decreases with the use of CTR. Refractive prediction for the Micro F design was good, with only -0,03 difference from target calculated with Haigis formula (non personalized, a0=1,36) The Pod design shows a both greater hyperopic shift and poorer predictability, and adjustments to the a-constants is needed.

Financial Disclosure:

NONE