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  • Visual performance of new multifocal IOL

Visual performance of new multifocal IOL
Reviewed by Mrinal Rana

1 February 2015 | Mrinal Rana | EYE - Cataract, EYE - Refractive

Multifocal IOLs (MIOLs) keep evolving to try and get the best outcome in terms of vision and reduction of side-effects. This prospective interventional study was carried out on 34 eyes of 17 patients (11 women (65%) and six men (35%)) with mean age of 64 years (SD - 12.8; range 42-84 years). All patients were enrolled under strict exclusion criteria making sure that no other ocular pathology was found, which could have an effect on the visual prognosis. They underwent binocular sequential surgery under topical anaesthesia using standard suture less phacoemulsification technique and the new bi-aspheric, segmented, multifocal intraocular lens was inserted. Outcome measures checked were manifest refraction, uncorrected and corrected distance and near visual acuity; defocus curves in photopic conditions; contrast sensitivity; halometry as an objective measurement of glare and patient satisfaction questionnaires. Mean residual refraction was –0.13(±0.51) dioptres (D). Twenty-five eyes (74%) were within the mean spherical equivalent of ±0.50D. Mean uncorrected distance acuity was +0.10±0.12 logMAR monocularly and 0.02±0.09 logMAR binocularly. Thirty-two eyes (94%) could read 0.3 or better without any reading correction and all patients could read 0.3 or better with the near correction. Mean monocular uncorrected near visual acuity was 0.18±0.16 logMAR, improving to 0.15±0.15 logMAR with distance correction. Mean binocular uncorrected near visual acuity was 0.11±0.11 logMAR, improving to 0.09±0.12 logMAR with distance correction. Mean binocular contrast sensitivity was 1.75±0.14 log units at three cycles per degree, 1.88±0.20 log units at six cycles per degree, 1.66±0.19 log units at 12 cycles per degree, and 1.11±0.20 log units at 18 cycles per degree. Mean binocular and monocular halometry showed glare profile of less than 1° of debilitating light scatter. Therefore the M plus MIOL has been found to be an effective method of providing good distance acuity and near vision. Further studies with extended follow-ups were suggested to get to know about the full potential of this premium implant.

Visual performance of a new bi-aspheric, segmented, asymmetric multifocal IOL.
Berrow EJ, Wolffsohn JS, Bilkhu PS, Dhallu S.
JOURNAL OF REFRACTIVE SURGERY
2014;30(9):584-8.
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CONTRIBUTOR
Mrinal Rana

University Hospital Coventry, Coventry, UK.

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