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  • Title: Visian toric implantable collamer lens for correction of compound myopic astigmatism.
    Author: Elies D, Alonso T, Puig J, Gris O, Güell JL, Coret A.
    Journal: J Refract Surg; 2010 Apr; 26(4):251-8. PubMed ID: 20415321.
    Abstract:
    PURPOSE: To assess the safety, efficacy, predictability, and stability of a toric posterior chamber phakic intraocular lens for the correction of myopia with astigmatism. METHODS: A non-randomized, retrospective analysis of 63 eyes of 36 patients with a minimum follow-up of 6 months was performed. The STAAR Toric Implantable Collamer Lens (TICL) was implanted under topical anesthesia through a 3-mm temporal clear corneal incision. Mean preoperative spherical equivalent refraction was -10.71+/-3.55 diopters (D). Median preoperative best spectacle-corrected visual acuity (BSCVA) was 20/25, with a mean sphere of -8.78 D (range: -2.50 to -16.50 D) and mean cylinder of 3.60 D (range: 1.25 to 7.00 D). Postoperative parameters were analyzed at different time points, and vector analysis was performed to calculate surgically induced astigmatism. RESULTS: Fifty-nine (93.6%) eyes had a spherical equivalent refraction within +/-1.00 D and 52 (82.5%) eyes were within +/-0.50 D of emmetropia. Median postoperative uncorrected visual acuity was 20/25 and BSCVA was 20/20. Preoperative keratometric astigmatism was 1.99@178.2 vs 1.82@178.6 postoperative keratometric astigmatism, most likely due to the surgical incision. Preoperative refractive astigmatism was 2.17@93 whereas postoperatively it reduced to 0.38@99.6. No eye lost 2 or more lines of Snellen BSCVA. Twenty-two (34.9%) eyes gained 2 or more Snellen lines of vision. Preoperatively, 45 (71.4%) eyes had a BSCVA of 20/30 or better, whereas 60 (95.2%) eyes were within this range of BSCVA after surgery. The TICL demonstrated good rotational stability in this study. CONCLUSIONS: Implantation of the STAAR TICL was an effective, predictable, and safe method for correction of high myopia and myopic astigmatism as shown in this retrospective observational series.
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