Evaluation of a toric intraocular lens with a Z-haptic

J Cataract Refract Surg. 2006 Sep;32(9):1492-8. doi: 10.1016/j.jcrs.2006.04.022.


Purpose: To evaluate the efficacy and rotational stability of the MicroSil 6116TU foldable 3-piece silicone toric intraocular lens (IOL) (HumanOptics).

Setting: 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.

Publication types

  • Evaluation Study

MeSH terms

  • Aged
  • Aged, 80 and over
  • Astigmatism / complications
  • Astigmatism / physiopathology
  • Cataract / complications
  • Humans
  • Lens Implantation, Intraocular*
  • Lenses, Intraocular*
  • Middle Aged
  • Phacoemulsification*
  • Prospective Studies
  • Prosthesis Design
  • Pseudophakia / physiopathology
  • Refraction, Ocular / physiology
  • Silicone Elastomers*
  • Visual Acuity / physiology


  • Silicone Elastomers