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Safety and efficacy of Precizon toric intraocular lens implantation: a prospective study

Poster Details

First Author: S.Hamada UK

Co Author(s):    A. Anbari   D. Lake           

Abstract Details


To determine the change in cylindrical power of the eye (difference between post-operative subjective refractive cylinder and pre-op corneal cylinder) and compare it with existing literature of IOL models without 'Transitional Conic Surface'


Tertiary referral eye centre in the UK


Prospective, open-label, non-randomized, single centre, cataract patients with pre-existing corneal astigmatism. 15 subjects were enrolled. Implantation of the PRECIZON toric intraocular lens was performed. All subjects in the investigation were evaluated pre and post operatively at day 1, month 1 and month 3. The following measurements were performed at various time points: refraction, UDVA, CDVA, applanation tonometry, slit lamp examination/photography, corneal topography and laser interference biometry, and wavefront analysis Outcome measures of efficacy were postoperative residual refractive astigmatism, ocular higher order aberration (spherical aberration (SA), coma, trefoil, and visual quality (modulation transfer function (MTF) and Strehl ratio. Outcomes measures for safety were reduction of BCVA by more than 2 lines, and any other reported operative or post-operative complications


15 patients completed the study At the last follow-up, there was a significant improvement of the following parameters compared with preoperative measurements. UDVA (0.8 ± 0.22 vs. 0.10 ± 0.24 log MAR; p < 0.05), cylindrical refraction (-2.72 ± 1.04 vs. -1.21 ± 0.9 D; p < 0.01), and refractive spherical equivalent (-3.46 ± 4.58 vs. -0.34 ± 1.1 D; p < 0.05). Residual astigmatism on the target axis was less than 0.5D (p < 0.01). Total ocular coma and trefoil were reduced compared with preoperative data in all patients and average Strehl ratio was 0.064.


PRECIZON aspheric toric intraocular lens is safe and effective for correcting corneal astigmatism during cataract surgery. FINANCIAL INTEREST: NONE

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