Injectable 1-piece hydrophilic acrylic toric intraocular lens for cataract surgery: efficacy and stability

To evaluate the efficacy and rotational stability of an injectable 1-piece hydrophilic acrylic toric intraocular lens (IOL).

Department of Ophthalmology, Hillingdon Hospital, Uxbridge, Middlesex, United Kingdom.

Cohort study.

This study enrolled consecutive patients who had 2.00 diopters (D) or more of preexisting corneal astigmatism. Patients had phacoemulsification with implantation of a T-flex 623T toric IOL through a 2.8 mm astigmatically neutral incision. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities (logMAR), refraction, keratometry, and the cylinder axis of the toric IOL were measured.

Thirty-three eyes of 25 patients were evaluated. The mean preoperative refractive astigmatism was 3.35 D ± 1.20 (SD) and the mean keratometric astigmatism, 3.98 ± 1.89 D, respectively. Four months postoperatively, the mean UDVA was 0.28 ± 0.23 D logMAR, improving to 0.19 ± 0.23 D logMAR CDVA. The mean refractive astigmatism was 0.95 D ± 0.66 D; vector analysis using the Holladay-Cravy-Koch method showed that the mean reduction in refractive astigmatism was 2.94 ± 0.89 D. The mean difference between the intended and the actual final IOL cylinder axis was 3.44 degrees (range 0 to 12).

The toric IOL reduced visually significant keratometric astigmatism and increased spectacle independence after cataract surgery. There were no cases of significant IOL rotation in the capsular bag 4 months postoperatively.