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DIFFRACTIVE IOL. (1) Closely spaced stepped rings diffract incoming light into near and
distance focal points. REFRACTIVE IOL. (2) Refractive designs use zones of different
optical powers, most commonly in alternating rings of near and far foci, to achieve
multifocality.

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Mini monovision versus multifocal iol

  • 1. DIFFRACTIVE IOL. (1) Closely spaced stepped rings diffract incoming light into near and distance focal points. REFRACTIVE IOL. (2) Refractive designs use zones of different optical powers, most commonly in alternating rings of near and far foci, to achieve multifocality.