Comparative early unaided visual outcomes, contrast sensitivity and defocus curves of 2 trifocal intraocular lens implants in Asian patients

Session Details

Session Title: Pseudophakic IOLs: Multifocal I

Session Date/Time: Monday 12/09/2016 | 08:00-10:30

Paper Time: 09:12

Venue: Auditorium A

First Author: : S.Ti SINGAPORE

Co Author(s): :    Y. Yang   S. Chee                 

Abstract Details

Purpose:

To compare postoperative unaided visual acuity (UVA), contrast sensitivity and defocus curves of 2 trifocal intraocular lens implants (IOL).

Setting:

Singapore National Eye Centre

Methods:

The first 40 eyes implanted with AT LISA tri (839MP/939MP) IOL were compared to a similar number of Finevision (POD F/FT) IOL. Main outcome measures were 1-month unaided distance acuity acuity (UD VA), proportion of patients reading N6 or better (intermediate and near VA), mean absolute error (MAE), presence of dysphotopsias and IOL-related complications (posterior capsule opacification (PCO) , rotation, explantation). Functional acuity contrast testing (FACT chart, photopic, cycles per degree[cpd]) and defocus curves were measured at 3-6 months postoperatively.

Results:

Both groups had similar preoperative keratometry and proportion of toric IOLs. Mean logMAR UDVA was 0.068±0.078 (AT LISA) and 0.096 ± 0.116 (Fienvision)(t-test, P>0.05). There was no significant difference in unaided near (AT LISA 94.7%, POD F 100.0%) & intermediate VA (AT LISA 34.5%, Finevision 33.6%). MAE was similar (AT LISA=0.293±0.213, Finevision = 0.264±0.156; t-test, P>0.05). Although haloes and glare size were similar, AT LISA delivered higher contrast acuity (18 cpd, p=0.001). Defocus curves indicated Finevision had superior near function (defocus add -2.5D, t-test, p=0.027). Complications: mild PCO (AT LISA =5) , IOL rotation (AT LISA=1); IOL explantation due to haloes (Finevision =1).

Conclusions:

Both trifocal IOL models provided satisfactory distance, intermediate, and near VA. Refractive predictability (MAE) was similar. AT LISA tri delivered better contrast acuity for higher spatial frequencies. Defocus curves indicated similar intermediate VA function in both, with Finevision delivering superior near VA function.

Financial Disclosure:

NONE