Clinical outcomes of custom surface ablation with Schwind Amaris 750 S vs 1050 RS with Smart Pulse Technology

Session Details

Session Title: Advanced Surface Photoablation I

Session Date/Time: Sunday 08/10/2017 | 08:00-09:30

Paper Time: 08:12

Venue: Meeting Center Room I

First Author: : P.Vinciguerra ITALY

Co Author(s): :    F. Camesasca   R. Vinciguerra   I. Torres              

Abstract Details

Purpose:

Excimer laser surface ablation inevitably leaves corneal stromal surface irregularity. Epithelial response to irregularity may then lead to haze, regression and reduced accuracy of refractive correction. We evaluated the difference in custom surface ablation results of myopia treatment between the 750 Hz and the 1050 Hz excimer laser featuring with Smart Pulse Technology (SPT).

Setting:

Ophthalmology Dept., Humanitas Research Institute, Rozzano, Milan, Italy

Methods:

We retrospectively reviewed and compared myopic refractive surgery eyes consecutively treated with transepithelial advanced surface ablation (ASA) with a 750 Hz excimer laser (Group 750, 306 eyes) vs. a 1050 Hz excimer laser coupled with an ablation software, Smart Pulse Technology (SPT) (Group SPT, 80 eyes). SPT algorithm is a laser pulse technology software aimed at enhancing refractive outcome by stromal bed irregularity reduction at the end of the treatment without hampering stability or long-term outcomes.

Results:

Group 750 mean refraction was -3.75 ± 3.31 sph, -1.07 ± 0.94 cyl, while Group SPT it was -4.10 ± 2.91 sph, -1.18 ± 1.04 cyl. Six months postoperatively, 55% vs. 21% achieved 20/16 or better acuity in the SPT and 750 groups, respectively (p = 0.005), and 90% and 65% achieved 20/20 or better in SPT and 750, respectively (p = 0.019). CDVA improved with time and appeared to be influenced by Group (p=0.054), with better results in Group SPT. Coma and trefoil improved significantly with time in a similar manner in both Groups.

Conclusions:

1050 Hz excimer laser allowed a significant reduction in surgical time, and the SPT technology provided a smother stromal bed after the ablation, leading to better improvement of six-month uncorrected visual acuity.

Financial Disclosure:

travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented