Multifocal IOLs With +2.5 D Near Addition in Japanese Eyes: 1-Year Results
To evaluate the efficacy and safety of a newly developed diffractive multifocal intraocular lens (IOL) with +2.5 diopter near add power (SN6AD2: Alcon), whose theoretical distance for near focus is 50 cm.
This study included 128 eyes of 64 patients (23 male and 41 female, average age: 66.7±7.2 years) following cataract removal at Tokyo Dental College Suidobashi Hospital or Hayashi Eye Hospital. Visual acuities (VAs) at distance (5 m), 1 m, 50 cm and 40 cm, distance and near contrast sensitivities, and a questionnaire were evaluated until 1 year postoperatively.
At 1 year postoperatively, mean bilateral logMAR VAs were uncorrected: -0.09±0.10 (5 m), 0.01±0.11 (1 m), 0.07±0.11 (50 cm), 0.18±0.15 (40 cm); distance corrected: 0.01±0.11 (1 m), 0.08±0.11 (50 cm), 0.19±0.12 (40 cm); and best corrected: -0.17±0.10 (5 m), 0.00±0.08 (50 cm). Contrast sensitivities at distance and near were within normal range at all frequencies. None of the patients complained of severe halo or glare.
This IOL provides good distance to intermediate VAs and better near VA compared to monofocal IOL.