title: The use of a supplemental sulcus fixated IOL (HumanOptics Add-On IOL) to correct pseudophakic refractive errors.
abstract: OBJECTIVE
  To evaluate the safety and efficacy of piggybacking with the HumanOptics Add-On intraocular lens (IOL) to correct pseudophakic refractive errors.
  
  
  METHODS
  Ten eyes of 10 patients with pseudophakic refractive errors were included in this study. All patients were targeted for a range of refraction -0.50 to +0.50 D. Uncorrected and corrected distance visual acuities (UDVA and CDVA, respectively), endothelial cell count (ECC), anterior chamber depth (ACD), the distance between intraocular lenses, and contrast sensitivity measurements under mesopic, scotopic, and scotopic with glare conditions were evaluated preoperatively and postoperatively.
  
  
  RESULTS
  The mean age of the patients was 54±27 years (range 4-78). Mean follow-up time was 10.5±1.36 months (range 6-15 months). Mean diopters of implanted Add-On IOLs were -1.4±6.9 (range -12 to +9 D). Mean preoperative and postoperative UDVA was 0.133±0.12 and 0.73±0.27, respectively (p=0.0001); mean preoperative and postoperative CDVA were 0.77±0.26 and 0.79±0.27, respectively (p=0.066). Mean preoperative and postoperative ACD were 3.87±0.91 mm vs 3.58±1.05 mm, respectively (p=0.343); mean inter-IOL distance was 0.53±0.08 mm. Mean preoperative and postoperative ECC were 2455±302 and 2426±294, respectively (p=0.55). All patients were within the targeted refractive range of -0.50 D to +0.50 D. No complications were observed during the operations or postoperative follow-up period.
  
  
  CONCLUSIONS
  Piggybacking with the Add-On IOL is a safe, efficient, and reliable technique to correct pseudophakic refractive errors.
authors.affiliation: Beyoglu Eye Education and Research Hospital, Istanbul - Turkey.
authors.forename: Berna
authors.initials: B
authors.lastname: Basarir
authors.forename: Vedat
authors.initials: V
authors.lastname: Kaya
authors.forename: Cigdem
authors.initials: C
authors.lastname: Altan
authors.forename: Sezen
authors.initials: S
authors.lastname: Karakus
authors.forename: Eylem Y
authors.initials: EY
authors.lastname: Pinarci
authors.forename: Ahmet
authors.initials: A
authors.lastname: Demirok
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000867:Anterior Chamber / Q000473:pathology; D002452:Cell Count; D002648:Child; D002675:Child, Preschool; D004728:Endothelium, Corneal / Q000473:pathology; D005260:Female; D019466:Glare; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011446:Prospective Studies; D019591:Pseudophakia / Q000601:surgery*; D012030:Refractive Errors / Q000628:therapy*; D014792:Visual Acuity; D055815:Young Adult