PURPOSE:

To evaluate the safety and effectiveness of laser-assisted in situ keratomileusis (LASIK) performed with Teneo 317 Model 2 using the latest laser ablation algorithm (Proscan 1.28 SW) in a subgroup of patients with preexisting corneal astigmatism of 1.50 D or higher.

METHODS:

This prospective, multicenter, open-label, non-randomized, single-arm study included 71 eyes that underwent LASIK with the Teneo 317 Model 2 (version 1.28 US SW, B&L) for the correction of myopia/myopic astigmatism. Inclusion criteria were eyes with preoperative best corrected distance visual acuity (CDVA) of 20/25 or better, manifest refraction spherical equivalent (MRSE) between -1.00 to -11.50 D, and preoperative astigmatism of - 1.50 to -3.00 D, without static cyclotorsion compensation. Outcome measures were uncorrected and corrected distance visual acuity (UDVA, CDVA), MRSE and astigmatism assessed at 9 months postoperatively.

RESULTS:

At postoperative 9 months, 87.3% of eyes achieved UDVA of 20/25 or better, and 98.6% achieved 20/40 or better. While 70.4% of the eyes showed no change in the lines of CDVA, 28.1% of the eyes gained 1 or more lines of CDVA. None of the eyes lost any line of CDVA. Mean MRSE improved from -6.28 +/-2.44 D preoperatively to -0.07 +/-0.32 D postoperatively with 90.1% and 98.6% of eyes achieving residual refractive error within +/- 0.50 D and +/- 1.00 D, respectively. The percentage of eyes with a residual refractive cylinder of 0.50 D and 1.00 D or less were 85.9% and 97.2%, respectively. Refractive outcomes were stable from postoperative 3 to 9 months.

CONCLUSION:

LASIK with Teneo 317 Model 2 excimer laser in patients with preoperative astigmatism of 1.50 D or higher is safe and effective, resulting in good visual and refractive outcomes that were stable through the last follow-up at 9 months. In the real world, with static cyclotorsion compensation, the astigmatic outcomes will likely improve further