One-Year Results of Microincision Toric IOLs: Prospective Japanese Multicenter Study

Monday, April 28, 2014: 8:26 AM
Room 151B (Boston Convention and Exhibition Center)
Hiroko Bissen-Miyajima, MD, PhD, Tokyo Dental College Suidobashi Hospital, Tokyo, Japan
Kazuno Negishi, MD, PhD, Keio University School of Medicine, Tokyo, Japan
Osamu Hieda, MD, Kyoto Prefectural Univ of Medicine, Kyoto, Japan
Hidemasa Torii, MD, Keio University, Tokyo, Japan
Shigeru Kinoshita, MD, PhD, KPUM, Kyoto, Japan

Narrative Responses:

Purpose
To evaluate the efficacy and safety of a new acrylic one-piece toric intraocular lens (IOL).

Methods
This prospective multicenter clinical study comprised 93 eyes of 61 patients that were implanted with a toric IOL (TC2, HOYA) at three sites from 2010 to 2012 and followed for 1 year. TC2 is a one-piece hydrophobic acrylic IOL with aspheric and yellow-tinted optics, with 3 steps of cylindrical powers (NHT15: 1.5 D, NHT23: 2.25 D, NHT30: 3.0 D). Inclusion criteria comprised the preoperative corneal astigmatisms from 0.75 to 2.99 D. Visual acuity (UDVA, CDVA), residual astigmatisms, and spectacle usage were evaluated 1 week, 1, 3, 6 and 12 months postoperatively. IOL rotation from 1 day postoperatively was also measured.

Results
At 1 year postoperatively, 75.3% of eyes achieved UDVA of 16/20 or more in total, and 83.7% with NHT15, 73.9% with NHT23, and 57.1% with NHT30, respectively. CDVA of 16/20 or more was achieved in 96.8%. While the mean preoperative corneal astigmatism was 1.46±0.55 D, the manifest astigmatism was reduced to 0.67±0.58 D (0.41±0.45 D for with-the-rule, 0.76±0.60 D for against-the-rule). 81.7% of the patients did not require distance spectacles. The mean IOL rotation was 3.15±5.32º at 1 year postoperatively.

Conclusion
The new one-piece toric IOL provided preferable clinical outcomes in the eyes with corneal astigmatisms.