title: Effect of position of near addition in an asymmetric refractive multifocal intraocular lens on quality of vision.
abstract: OBJECTIVE
  To evaluate the impact of the position of an asymmetric multifocal near segment on visual quality.
  
  
  METHODS
  Cathedral Eye Clinic, Belfast, United Kingdom.
  
  
  METHODS
  Retrospective comparative case series.
  
  
  METHODS
  Data from consecutive patients who had bilateral implantation of the Lentis Mplus LS-312 multifocal intraocular lens were divided into 2 groups. One group received inferonasal near-segment placement and the other, superotemporal near-segment placement. A +3.00 diopter (D) reading addition (add) was used in all eyes. The main outcome measures included uncorrected distance visual acuity (UDVA), uncorrected near visual acuity (UNVA), contrast sensitivity, and quality of vision. Follow-up was 3 months.
  
  
  RESULTS
  Patients ranged in age from 43 to 76 years. The inferonasal group comprised 80 eyes (40 patients) and the superotemporal group, 76 eyes (38 patients). The mean 3-month spherical equivalent was -0.11 D ± 0.49 (SD) in the inferonasal group and -0.18 ± 0.46 D in the superotemporal group. The mean postoperative UDVA was 0.14 ± 0.10 logMAR and 0.18 ± 0.15 logMAR, respectively. The mean monocular UNVA was 0.21 ± 0.14 logRAD and 0.24 ± 0.13 logRAD, respectively. No significant differences were observed in the higher-order aberrations, total Strehl ratio (point-spread function), or modulation transfer function between the groups. Dysphotopic symptoms measured with a validated quality-of-vision questionnaire were not significantly different between groups.
  
  
  CONCLUSIONS
  Positioning of the near add did not significantly affect objective or subjective visual function parameters.
authors.affiliation: From the Cathedral Eye Clinic (de Wit, Diaz, Moutari, J.E. Moore), Belfast Campus, University of Ulster, the Centre for Statistical Science and Operational Research (de Wit, Moutari), Queen's University Belfast, and the School of Biomedical Sciences (T.C.B. Moore, J.E. Moore), University of Ulster, Coleraine, United Kingdom; the Department of Ophthalmology (Diaz), University of Chile, Santiago, Chile.
authors.forename: Deric W
authors.initials: DW
authors.lastname: de Wit
authors.affiliation: From the Cathedral Eye Clinic (de Wit, Diaz, Moutari, J.E. Moore), Belfast Campus, University of Ulster, the Centre for Statistical Science and Operational Research (de Wit, Moutari), Queen's University Belfast, and the School of Biomedical Sciences (T.C.B. Moore, J.E. Moore), University of Ulster, Coleraine, United Kingdom; the Department of Ophthalmology (Diaz), University of Chile, Santiago, Chile.
authors.forename: Jose
authors.initials: J
authors.lastname: Diaz
authors.affiliation: From the Cathedral Eye Clinic (de Wit, Diaz, Moutari, J.E. Moore), Belfast Campus, University of Ulster, the Centre for Statistical Science and Operational Research (de Wit, Moutari), Queen's University Belfast, and the School of Biomedical Sciences (T.C.B. Moore, J.E. Moore), University of Ulster, Coleraine, United Kingdom; the Department of Ophthalmology (Diaz), University of Chile, Santiago, Chile.
authors.forename: Tara C B
authors.initials: TC
authors.lastname: Moore
authors.affiliation: From the Cathedral Eye Clinic (de Wit, Diaz, Moutari, J.E. Moore), Belfast Campus, University of Ulster, the Centre for Statistical Science and Operational Research (de Wit, Moutari), Queen's University Belfast, and the School of Biomedical Sciences (T.C.B. Moore, J.E. Moore), University of Ulster, Coleraine, United Kingdom; the Department of Ophthalmology (Diaz), University of Chile, Santiago, Chile.
authors.forename: Salissou
authors.initials: S
authors.lastname: Moutari
authors.affiliation: From the Cathedral Eye Clinic (de Wit, Diaz, Moutari, J.E. Moore), Belfast Campus, University of Ulster, the Centre for Statistical Science and Operational Research (de Wit, Moutari), Queen's University Belfast, and the School of Biomedical Sciences (T.C.B. Moore, J.E. Moore), University of Ulster, Coleraine, United Kingdom; the Department of Ophthalmology (Diaz), University of Chile, Santiago, Chile. Electronic address: johnnymoorebal@gmail.com.
authors.forename: Jonathan E
authors.initials: JE
authors.lastname: Moore
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology* / Q000523:psychology; D011788:Quality of Life / Q000523:psychology*; D012189:Retrospective Studies; D011795:Surveys and Questionnaires; D014785:Vision, Ocular / Q000502:physiology*; D014792:Visual Acuity / Q000502:physiology*