title: Factors affecting near vision after monofocal intraocular lens implantation.
abstract: OBJECTIVE
  To identify factors that influence near vision after monofocal intraocular lens (IOL) implantation for distance vision.
  
  
  METHODS
  A retrospective review was conducted of patients who underwent cataract surgery with monofocal IOL implantation from October 2009 to April 2010 at Samsung Medical Center. Eyes were classified as having good (⩾ J4) or poor (< J4) near vision. Factors analyzed included age, sex, intraocular lens (IOL) movement, axial length, pupil size, degree and type of astigmatism, IOL type, total aberration, and higher-order aberrations. Binary logistic regression and odds ratios with 95% confidence intervals were determined.
  
  
  RESULTS
  This retrospective study involved 84 eyes of 84 patients. Thirty-four eyes were classified as having good near vision and 50 eyes as having poor near vision. All groups had a postoperative uncorrected visual acuity greater than 0.2 logMAR (Snellen 20/32) and a refractive error within ± 0.5 diopter of spherical equivalent. Pupil size and axial length were inversely associated with good near vision (P = .034 and .039, respectively). A pupil size smaller than 2.6 mm and an axial length less than 23.0 mm resulted in better near vision than larger measurements after monofocal IOL implantation for distant target.
  
  
  CONCLUSIONS
  Among the factors analyzed, small pupil size and short axial length predicted good near vision after phacoemulsification and monofocal IOL implantation.
authors: Department of Ophthalmology, Samsung Medical Center, Seoul, Korea.
authors: Dong Hui
authors: DH
authors: Lim
authors: Jong Chul
authors: JC
authors: Han
authors: Myung Hun
authors: MH
authors: Kim
authors: Eui-Sang
authors: ES
authors: Chung
authors: Tae-Young
authors: TY
authors: Chung
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D058452:Axial Length, Eye / Q000473:pathology; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011379:Prognosis; D019591:Pseudophakia / Q000503:physiopathology; D011680:Pupil / Q000502:physiology; D012189:Retrospective Studies; D014792:Visual Acuity / Q000502:physiology*