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