Evaluation of New Bi-aspheric +3.0 D Nonblended Segment Multifocal IOL

Friday, April 25, 2014
KIOSKS (Boston Convention and Exhibition Center)
Sunil Shah, MD, FRCOphth, Midland Eye, Birmingham, United Kingdom
Emma Berrow, PhD, Aston University, Birmingham, United Kingdom
James S. Wolffsohn, MBA, PhD, Aston University, Birmingham, United Kingdom
Shehzad A. Naroo, MSc, PhD, Aston University, Birmingham, United Kingdom

Narrative Responses:

Purpose
To evaluate the visual performance of patients implanted with a new bi-aspheric, +3D non-blended segment, multifocal intraocular lens (IOL) available in quarter dioptre powers.

Methods
Fourteen patients (23 eyes) with cataracts average age 66.7 ± 9.47 years (age range 41 -79 years old) were implanted with the aspheric, segmented multifocal IOL. One month after surgery uncorrected (UCVA) and best-corrected (BCVA) distance, intermediate and near visual acuity were measured along with residual refractive error. Contrast sensitivity was assessed with the Pelli-Robson chart. Defocus curves were assessed over a range of +1.50 to -5.00D in 0.5D steps with the letters randomized between presentations. Halometry using a glare source was also plotted.

Results
The residual refractive error was 0.01±0.47D (range -1.25 to +0.88). Mean UCVA was 0.09 logMAR (SD ± 0.19, range -0.22 – 0.52). Mean near UCVA was N6 test type (range N10 – N5). Patient satisfaction with NAVQ was 1.15. Contrast sensitivity was good (1.66 ±0.07 log units) and defocus curves show a peak near equivalent VA of 0.23 logMAR (SD ± 0.18) between -2.0 and -2.5D and a distance VA of 0.01 logMAR (SD ± 0.14) at 0.0 D. Halometry showed less than 1 degree of debilitating light scatter, with an asymmetric profile reflecting the location of the IOL segment.

Conclusion
This new aspheric segmented IOL provides a good visual outcome at distance and near with minimal dysphotopsia.