title: Near add power of the diffractive multifocal intraocular lens.
abstract: OBJECTIVE
  To assess near visual acuity and patient satisfaction with the 3M diffractive multifocal intraocular lens (IOL).
  
  
  METHODS
  Asan Medical Center, Ulsan University, Seoul, Korea.
  
  
  METHODS
  Near acuity of 50 eyes implanted with the diffractive multifocal IOL was evaluated postoperatively. Near visual acuity was measured with best distance correction at 33 cm and then at each patient's preferred distance with an extra add of -0.25, +0.25, +0.50, or +0.75 D to the best distance correction. Mean follow-up was 11 months.
  
  
  RESULTS
  All eyes obtained a near vision of J3 or better with the best distance correction and 34 (68.0%) obtained J1 or better. Extra add power increased near vision and was preferred in 44 eyes (88.0%) even though the reading distance was shortened.
  
  
  CONCLUSIONS
  We recommend adding more than +3.5 D to the 3M multifocal IOL.
authors.affiliation: Department of Ophthalmology, Asan Medical Center, Ulsan University, Seoul, Korea.
authors.forename: H
authors.initials: H
authors.lastname: Tchah
authors.forename: W J
authors.initials: WJ
authors.lastname: Choi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D018918:Phacoemulsification; D011474:Prosthesis Design; D014792:Visual Acuity / Q000502:physiology*