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O. Truneva, I. Davydova, S. Borisov; New Generation Excimer Laser System Zyoptix-100 in Refractive Surgery of Myopic Patients. Invest. Ophthalmol. Vis. Sci. 2008;49(13):3363.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate results of "aspheric" program (AP) and "tissue saving" program (TSP) LASIK procedures performed on new generation Zyoptix-100 system (Bausch & Lomb).
67 patients underwent refractive surgery using Zyoptix-100: 44 patients (87 eyes) with low/medium myopia had AP and 23 patients (44 eyes) with medium/high myopia and corneal thickness of 500 µm and less had TSP procedure. Preoperative mean uncorrected visual acuity (VA) was 0.07±0.007 in AP group and 0.07±0.003 in TSP group. 23% of the eyes in TSP group were ambliopic. Applied parameters included combination of 1-mm and 2-mm spot diameters, truncated Gaussian profile form of energy distribution, 100-Hz impulse frequency, 120-mJ impulse energy density. Flap, 8.5-9.5 mm in diameter, was formed using microkeratome Zyoptix XP, 120-140µm-thick for AP and 120µm-thick for TSP. Optical zone ranged in 5.5-7.0 mm.
One month after surgery, mean uncorrected VA was 0.93±0.03 in AP group and 0.77±0.06 in TSP group. Lower VA in TSP group resulted from amblyopia. All patients in both groups reported satisfaction by quality of vision after surgery. Best quality was achieved in AP group where none of the patients complained on vision blurriness, halos or glare at any time and all revealed fast adaptation to near-sight work.
Our results showed effective individual approach, high quality of vision results achieved by using new generation Excimer Laser Zyoptix-100 system in patients with different degree myopia. "Tissue saving" program is effective in medium/high myopic patients with cornea as thin as 470 µm, in particular, when using microkeratome head forming 120-thick flap. "Aspheric" program provides high quality vision in low/medium myopia and high myopia with sufficient corneal thickness.
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