[Functional results after implantation of Array type refractive multifocal intraocular lenses]

A prospective study is under way to assess the performance of refractive multifocal intraocular lenses (IOL) of the "Array" type. The results obtained in 35 patients who have been followed up for at least 3 months are reported. In the course of the study it is planned that 100 IOL of this type be implanted. The following parameters were evaluated: distance visual acuity, near visual acuity (Nieden, Jaeger), contrast sensitivity (Regan charts 96%, 50%, 25%, 11%), glare (Brightness Acuity Tester, BAT) for distance and near visual acuity, and other Regan charts. In 28% of the patients the best distance visual acuity was achieved without any correction, while 13% (Nieden 1-3) and 47% (Jaeger 1-3) did not need any correction for their best close visual acuity. Overall, an average correction of +2.6 D was necessary for best near-visual acuity. The average uncorrected distance visual acuity was 0.7, and the average best corrected distance visual acuity was 1.0. In contrast sensitivity testing with the 50% Regan chart, visual acuity decreased by an average of 16% compared with the 96% chart. Even lower contrast reduced visual acuity by 33% (25% chart) and 81% (11% chart) compared with the 96% chart. When glare was tested with BAT at the "high" position the average visual acuity against that without BAT decreased by 19% for the 96% chart, by 25% for the 50% chart, by 45% for the 25% chart and by 82% for the 11% chart. The Array-type IOL allows good distance and near visual acuity.(ABSTRACT TRUNCATED AT 250 WORDS)