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Custom surface ablation with Schwind Amaris 750 S vs 1050 RS with Smart Pulse Technology: intraoperative measurements and clinical outcomes

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Session Details

Session Title: Photoablation, Cross-Linking and Intracorneal Ring Segment

Session Date/Time: Monday 07/09/2015 | 08:00-10:30

Paper Time: 09:30

Venue: Room 16

First Author: : P.Vinciguerra ITALY

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

Abstract Details


To evaluate the difference in results between excimer laser refractive surgery with the Schwind 750 Hz and the 1050 Hz with Smart Pulse Technology (SPT).


Humanitas Clinical and Research Center, Rozzano, Italy


We treated Group 1 of eyes (n= 306) with Schwind Amaris excimer laser 750S Hz pulse rate, and Group 2 (n=80) with 1050RS SPT laser. The two groups were comparable for age, sex and amount of refractive defect (Group 1 mean refraction -3.75 ± 3.31 sph, -1.07 ± 0.94 cyl; Group 2 mean refraction -4.10 ± 2.91 sph, -1.18 ± 1.04 cyl). SPT It is a pulse technology to enhance short term outcomes by reducing the residual roughness of the residual bed without compromising stability or long term outcomes.


Treatment settings were comparable: Group 1 optical zone (OZ) 7.64 ± 0.43 mm, transition zone (TZ) 1.90 ± 0.50 mm Group 2 OZ 7.57 ± 0.47 mm, TZ 1.73 ± 0.65 mm. Objective intraoperative roughness and local deviation, evaluated with topography, was 60% lower in SPT Group, similarly intraoperative visual acuity was +2,4±1,7 lines better for SPT. Six months postoperatively, there was no reduction in visual acuity, and mean refraction in Group 1 was -0.13 ± 0.30 sph, -0.14 ± 0.26 cyl , while in Group 2 it was -0.09 ± 0.28 sph, -0.08 ± 0.18 cyl (p<.05). Haze in Group 1 was 0.15 ± 0.40, in Group 2 0.19 ± 0.33 (n.s.)


Amaris 1050 RS with SPT allowed a reduction in time of treatment of almost 25%, and the SPT technology provided significantly better reduction of astigmatism and a smother stromal bed after the ablation.

Financial Interest:

One of the authors receives consulting fees, retainer, or contract payments from a competing company

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