Comparison of a bifocal and a trifocal intraocular lens

Session Details

Session Title: Pseudophakic IOLs/ Multifocals II

Session Date/Time: Tuesday 16/09/2014 | 08:00-10:30

Paper Time: 08:52

Venue: Boulevard A

First Author: : E.Law UK

Co Author(s): :    R. Aggarwal   H. Kasaby           

Abstract Details

Purpose:

To compare the visual and refractive outcomes after bilateral implantation of a bifocal and a trifocal multifocal intraocular lenses (IOL), considering distance, near and intermediate vision.

Setting:

BMI Southend Private Hospital

Methods:

This study comprised patients who had bilateral implantation of either the AT LISA Trifocal IOL or the Lentis Mplus sectoral bifocal IOL after phacoemulsification 6 months previously. The main outcome measures were Uncorrected (UDVA) and Best Corrected (BCVA) measured in LogMAR. Near Visual Acuity (NVA) and Intermediate Visual Acuity (IVA) were measured in LogRAD using the Radner reading charts and reading speed was also assessed. Preferred working distance and reading range were measured. Standardised lighting levels were used throughout.

Results:

50 patients (100 eyes) were included. 25 patients implanted with the Lentis Mplus and 25 patients with AT LISA Trifocal. At 6 months post-operative, the Lentis Mplus group had Mean Spherical refraction was 0.37DS ± 0.28 (SD) and astigmatic refraction was -0.43DC±0.26(SD). Mean UDVA was 0.09 LogMAR ±0.10 and BCVA was -0.01 LogMAR ±0.16. Near and Intermediate Visual Acuity mean values were 0.17 and 0.40 respectively. Preferred Reading distance was 41cm and mean range was 24.5 to 54.7cm The AT LISA group had Mean Spherical refraction of 0.39DS ± 0.25 (SD) and astigmatic refraction was -0.46DC±0.24(SD). Mean UDVA was 0.10LogMAR ±0.07 and BCVA was 0.00 LogMAR±0.06. Near and Intermediate Visual Acuity mean values were 0.14 and 0.40 respectively. Preferred Reading distance was 34.6cms and mean range was 25 to 42cm.

Conclusions:

Post operative visual acuity was good at distance, intermediate and near with both IOL models, but there is no statistically significant difference between the lenses in visual acuity measures. No spectacles were used by any of the patients. The Lentis Mplus group had a longer preferred reading distance and increased range of reading distance. This explains the good intermediate visual acuity achieved although the lens is a bifocal. The Lentis Mplus Bifocal IOL provides as good intermediate vision as the AT LISA Trifocal intraocular lenses and a wider range of clear near vision is achieved.

Financial Interest:

NONE