title: Comparison of blue light-filtering IOLs and UV light-filtering IOLs for cataract surgery: a meta-analysis.
abstract: BACKGROUND
  A number of published randomized controlled trials have been conducted to evaluate visual performance of blue light-filtering intraocular lenses (IOL) and UV light-filtering intraocular lenses (IOL) after cataract phacoemulsification surgery. However, results have not always been consistent. Therefore, we carried out a meta-analysis to compare the effectiveness of blue light-filtering IOLs versus UV light-filtering IOLs in cataract surgery.
  
  
  RESULTS
  Comprehensive searches of PubMed, Embase, Cochrane Library and the Chinese BioMedical literature databases were performed using web-based search engines. Fifteen trials (1690 eyes) were included for systematic review, and 11 of 15 studies were included in this meta-analysis. The results showed that there were no significant differences in postoperative mean best corrected visual acuity, contrast sensitivity, overall color vision, or in the blue light spectrum under photopic light conditions between blue light-filtering IOLs and UV light-filtering IOLs [WMD = -0.01, 95%CI (-0.03, 0.01), P = 0.46; WMD = 0.07, 95%CI (-0.04, 0.19), P = 0.20; SMD = 0.14, 95%CI (-0.33, 0.60), P = 0.566; SMD = 0.20, 95%CI (-0.04, 0.43), P = 0.099]. However, color vision with blue light-filtering IOLs was significantly reduced in the blue light spectrum under mesopic light conditions [SMD = 0.74, 95%CI (0.29, 1.18), P = 0.001].
  
  
  CONCLUSIONS
  This meta-analysis demonstrates that postoperative visual performance with blue light-filtering IOLs is approximately equal to that of UV light-filtering IOLs after cataract surgery, but color vision with blue light-filtering IOLs demonstrated some compromise in the blue light spectrum under mesopic light conditions.
authors.affiliation: Department of Ophthalmology, Shanghai First People's Hospital Affiliated Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Xiao-feng
authors.initials: XF
authors.lastname: Zhu
authors.forename: Hai-dong
authors.initials: HD
authors.lastname: Zou
authors.forename: Yong-fu
authors.initials: YF
authors.lastname: Yu
authors.forename: Qian
authors.initials: Q
authors.lastname: Sun
authors.forename: Nai-qing
authors.initials: NQ
authors.lastname: Zhao
mesh_terms: D002387:Cataract Extraction / Q000379:methods*; D055253:Color Vision; D015350:Contrast Sensitivity; D005374:Filtration / Q000295:instrumentation*; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000295:instrumentation* / Q000379:methods*; D008027:Light; D016032:Randomized Controlled Trials as Topic; D016896:Treatment Outcome; D014792:Visual Acuity