[Wavefront-guided laser in situ keratomileusis for myopia].
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.


CONCLUSIONS
Patients undergoing Zyoptix treatment have better quality of vision after surgery than Planoscan patients.
Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China. gzstwang@pub.guangzhou.gd.cn
Zheng
Z
Wang
Bin
B
Yang
Chun
C
Zhang
Guo-fu
GF
Huang
Jia-qi
JQ
Chen
D000328:Adult; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D008297:Male; D009216:Myopia / Q000601:surgery*; D011184:Postoperative Period; D011897:Random Allocation; D012029:Refraction, Ocular; D012680:Sensitivity and Specificity; D016896:Treatment Outcome