title: Evaluation of a toric intraocular lens with a Z-haptic.
abstract: OBJECTIVE
  To evaluate the efficacy and rotational stability of the MicroSil 6116TU foldable 3-piece silicone toric intraocular lens (IOL) (HumanOptics).
  
  
  METHODS
  Department of Ophthalmology, Hillingdon Hospital, Uxbridge, Middlesex, United Kingdom.
  
  
  METHODS
  This prospective observational study included 21 eyes of 14 consecutive patients with more than 1.50 diopters (D) of preexisting corneal astigmatism having cataract surgery. Phacoemulsification was performed, and a MicroSil 6116TU toric IOL was inserted through a 3.4 mm temporal corneal incision. LogMAR uncorrected visual acuity (UCVA), best corrected visual acuity, refraction, keratometry, and cylinder axis of the toric IOL were measured.
  
  
  RESULTS
  The mean preoperative refractive and keratometric astigmatism was 3.52 D +/- 1.11 (SD) and 3.08 +/- 0.76 D, respectively. Six months postoperatively, the logMAR UCVA in eyes without ocular comorbidity (n = 14) was 0.20 +/- 0.15 (Snellen 20/32). Seventy-nine percent (11 eyes) had a visual acuity of 0.24 (Snellen 20/35) or better. The mean refractive astigmatism at 6 months was 1.23 +/- 0.90 D. Vector analysis using the Holladay-Cravy-Koch method showed a mean reduction in refractive astigmatism of 2.16 +/- 2.33 D. The mean difference between intended and achieved cylinder axis at 6 months was 5.2 degrees (range 0 to 15 degrees). No IOL rotated more than 5 degrees during the follow-up period.
  
  
  CONCLUSIONS
  The MicroSil 6116TU toric IOL reduced visually significant keratometric astigmatism and increased spectacle independence. The IOL was stable in the capsular bag, showing no significant rotation up to 6 months postoperatively.
authors.affiliation: Hillingdon Hospital, Department of Ophthalmology, Uxbridge, Middlesex, United Kingdom.
authors.forename: Don Julian
authors.initials: DJ
authors.lastname: De Silva
authors.forename: Yashin D
authors.initials: YD
authors.lastname: Ramkissoon
authors.forename: Philip A
authors.initials: PA
authors.lastname: Bloom
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001251:Astigmatism / Q000150:complications / Q000503:physiopathology; D002386:Cataract / Q000150:complications; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008875:Middle Aged; D018918:Phacoemulsification; D011446:Prospective Studies; D011474:Prosthesis Design; D019591:Pseudophakia / Q000503:physiopathology; D012029:Refraction, Ocular / Q000502:physiology; D012826:Silicone Elastomers; D014792:Visual Acuity / Q000502:physiology
chemical_list: D012826:Silicone Elastomers