title: Visual outcomes and subjective experience after bilateral implantation of a new diffractive trifocal intraocular lens.
abstract: OBJECTIVE
  To assess clinical outcomes and subjective experience after bilateral implantation of a diffractive trifocal intraocular lens (IOL).
  
  
  METHODS
  Midland Eye Institute, Solihull, United Kingdom.
  
  
  METHODS
  Cohort study.
  
  
  METHODS
  Patients had bilateral implantation of Finevision trifocal IOLs. Uncorrected distance visual acuity, corrected distance visual acuity (CDVA), and manifest refraction were measured 2 months postoperatively. Defocus curves were assessed under photopic and mesopic conditions over a range of +1.50 to -4.00 diopters (D) in 0.50 D steps. Contrast sensitivity function was assessed under photopic conditions. Halometry was used to measure the angular size of monocular and binocular photopic scotomas arising from a glare source. Patient satisfaction with uncorrected near vision was assessed using the Near Activity Visual Questionnaire (NAVQ).
  
  
  RESULTS
  The mean monocular CDVA was 0.08 logMAR ± 0.08 (SD) and the mean binocular CDVA, 0.06 ± 0.08 logMAR. Defocus curve testing showed an extended range of clear vision from +1.00 to -2.50 D defocus, with a significant difference in acuity between photopic conditions and mesopic conditions at -1.50 D defocus only. Photopic contrast sensitivity was significantly better binocularly than monocularly at all spatial frequencies. Halometry showed a glare scotoma of a mean size similar to that in previous studies of multifocal and accommodating IOLs; there were no subjective complaints of dysphotopsia. The mean NAVQ Rasch score for satisfaction with near vision was 15.9 ± 10.7 logits.
  
  
  CONCLUSIONS
  The trifocal IOL implanted binocularly produced good distance visual acuity and near and intermediate visual function. Patients were very satisfied with their uncorrected near vision.
authors: School of Life and Health Sciences, Aston University, Birmingham, United Kingdom. a.sheppard@aston.ac.uk
authors: Amy L
authors: AL
authors: Sheppard
authors: Sunil
authors: S
authors: Shah
authors: Uday
authors: U
authors: Bhatt
authors: Gurpreet
authors: G
authors: Bhogal
authors: James S
authors: JS
authors: Wolffsohn
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D019466:Glare; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D018918:Phacoemulsification; D011446:Prospective Studies; D011474:Prosthesis Design; D011788:Quality of Life; D011795:Surveys and Questionnaires; D016896:Treatment Outcome; D015348:Vision, Binocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology*