Clinical Outcome and Rotational Stability of 4-Haptic Toric IOL in Myopic Eyes
Narrative Responses:
Purpose
Evaluate the refractive outcome and rotational stability of a 4-haptic, toric intraocular lens (IOL) in myopic eyes and the correlations between IOL rotation and refractive sphere, axial length (AL) or white-to-white diameter (WTW).
Methods
This prospective non-comparative study included twenty eyes (20 patients) who underwent cataract extraction by phacoemulsification and implantation of the AT TORBI 709M. Corneal astigmatism was 1.50 D or greater and AL between 25 and 27 mm for all eyes. Exclusion criteria were prior ocular surgery, systemic and ocular anomalies or pathologies that could reduce visual function or postoperative IOL stability and patients not suitable for adequate follow-up. Uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction and IOL axis were evaluated pre- and postoperatively up to 6 months.
Results
Both UDVA and CDVA improved significantly (p<0.001) after the surgery. The mean refractive spheric equivalent decreased significantly (p<0.001) from -7.10±1.78 D to -0.55±0.25 D one day postoperatively and remained stable thereafter. Vector analysis showed that 90% and 85% of the eyes were within ±0.25 D for J0 and J45 respectively. At 3 and 6 months, the mean IOL rotation was 2.66±1.53 degrees and 3.00±1.69 degrees respectively (p<0.001), with respectively 95% and 90% of the eyes within ±5 degrees. A positive correlation was found between IOL rotation and preoperative sphere, and none was found with AL and WTW.
Conclusion
The implantation of the AT TORBI 709M toric IOL in myopic eyes was effective and safe. The lens showed no significant rotation over the 6 month follow-up period.