title: Effect of aspherical and yellow tinted intraocular lens on blue-on-yellow perimetry.
abstract: OBJECTIVE
  To investigate the possible effect of aspherical or yellow tinted intraocular lens (IOL) on contrast sensitivity and blue-on-yellow perimetry.
  
  
  METHODS
  This prospective randomized bilateral double-masked clinical study included 52 patients with visually significant bilateral cataracts divided in two groups; 25 patients (50 eyes) received aspherical intraocular lens in one eye and spherical intraocular lens in the fellow eye; and 27 patients (54 eyes) received ultraviolet and blue light filter (yellow tinted) IOL implantation in one eye and acrylic ultraviolet filter IOL in the fellow eye. The primary outcome measures were contrast sensitivity and blue-on-yellow perimetry values (mean deviation [MD] and pattern standard deviation [PSD]) investigated two years after surgery. The results were compared intra-individually.
  
  
  RESULTS
  There was a statistically significant between-group (aspherical and spherical intraocular lens) difference in contrast sensitivity under photopic conditions at 12 cycles per degree and under mesopic conditions at all spatial frequencies. There were no between-group significant differences (yellow tinted and clear intraocular lens) under photopic or mesopic conditions. There was no statistically significant difference between all intraocular lens in MD or PSD.
  
  
  CONCLUSIONS
  Contrast sensitivity was better under mesopic conditions with aspherical intraocular lens. Blue-on-yellow perimetry did not appear to be affected by aspherical or yellow tinted intraocular lens. Further studies with a larger sample should be carried out to confirm or not that hypotheses.
authors.affiliation: Ophthalmology Department, Universidade de São Paulo (USP), São Paulo, Brazil. rodrigo166@uol.com.br
authors.forename: Rodrigo França de
authors.initials: RF
authors.lastname: Espíndola
authors.forename: Marcony Rodrigues de
authors.initials: MR
authors.lastname: Santhiago
authors.forename: Newton
authors.initials: N
authors.lastname: Kara-Júnior
mesh_terms: D000368:Aged; D002386:Cataract; D055253:Color Vision; D015350:Contrast Sensitivity; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011446:Prospective Studies; D014792:Visual Acuity; D058609:Visual Field Tests / Q000379:methods*