Vissum was the first in Spain and worldwide the fourth provider of eye laser operations to acquire this new laser generation.
The SCHWIND AMARIS was primarily developed for refractive surgery (nearsightedness, farsightedness and astigmatism). Healed corneal ulcers and corneal glaucoma can also be treated. A decisive advantage of this laser is monitoring of the operational procedure with integrated Online Pachymetry. During the procedure, changes in stromal thickness are displayed in real-time. This allows virtually complete control over the entire corneal tissue removal process.
Furthermore, the SCHWIND AMARIS has a unique debris removal system as well as many other technical innovations – such as, for example, control systems for minimizing energy loss or for thermally-optimized laser pulse distribution. The latter enables not only fast ablation, but also makes the laser very safe and efficient and, above all, generates a minimum corneal aggression.
Biological aspects
The thermal control technology and control of the ablation with two automatically adjusted fluence values plays a very important role, especially among biological aspects: The less biological interaction there is with corneal tissue, the more reliable is healing of the wound. Thus, the treatment is more precise and less invasive in regard to possible tissue trauma. Probably this is why the patients see so well the day after surgery. After only one day following the operational procedure, patients achieve a higher visual acuity than pre-operative best corrected with glasses or contact lenses.
Whoever could see 90 percent before the procedure sees 110 percent or 120 percent one day after. This is account ed for in clinical results from more than 50 patients already treated with the SCHWIND AMARIS. Thereby, one-month results for 61 eyes are available. These results show to what degree patients may profit from a treatment with the SCHWIND AMARIS. 45 were myopic eyes with corrections up to -7 D in spherical equivalent (moderate myopia, average -4.08 D), 4 were myopic eyes with corrections higher than -7 D in spherical equivalent (high myopia, average -7.62 D), and 12 were hyperopic eyes with corrections up to +4 D in spherical equivalent (average +1.85 D). 65 percent of the moderate myopic eyes achieved postoperative uncorrected vision of 20/20 or better. In 100 percent of those eyes the visual acuity increased to 20/40 or better (average 20/20). 25 percent of high myopic eyes reached a postoperative uncorrected visual acuity of 20/20 or better. In 100 percent of those eyes the visual acuity increased to 20/40 or better (average 20/25). 33 percent of hyperopic eyes achieved a postoperative uncorrected visual acuity of 20/20 or better. In 100 percent of those eyes the visual acuity was increased to 20/40 or better (average 20/25).
The predictability of the target refraction was also very good: After one month, 91 percent of moderate myopic eyes were in the range of +/-0.5 D (average -0.06 D). 100 percent of high myopic eyes were in the range of +/-0.5 D (average 0.00 D). 92 percent of hyperopic eyes were in the range of +/-0.5 D (average -0.18 D). All results were reached without the use of individual nomograms.
