[Wavefront-guided laser in situ keratomileusis for myopia]

Abstract

Objective: To compare the clinical results of wavefront-guided versus conventional LASIK surgery in the treatment of myopia.

Methods: One hundred and thirteen eyes underwent wavefront-guided LASIK (Zyoptix) and 335 eyes were received conventional LASIK surgery (Planoscan). Besides visual acuity and refractions, the higher order aberrations and contrast sensitivity are also compared after surgery.

Results: The postoperative refractions were not significantly different between the Zyoptix group and Planoscan group. 33.6% of Zyoptix patient and 17.0% of Planoscan patient respectively, had postoperative uncorrected visual acuity than their preoperative best corrected visual acuity. At 6 mm pupil size, the higher order RMS was increased by 100% in the Planoscan group, while in the Zyoptix group, it was increased only by 35% postoperatively. Six months after operation, the contrast sensitivity of Planoscan patients returned to their preoperative baseline. However, the Zyoptix patients had slightly better contrast sensitivity than their preoperative level.

Conclusion: Patients undergoing Zyoptix treatment have better quality of vision after surgery than Planoscan patients.