|
KMID : 0213520070210030131
|
|
Korean Journal of Ophthalmology
2007 Volume.21 No. 3 p.131 ~ p.136
|
|
|
The Changes of Posterior Corneal Surface and High-Order Aberrations after Refractive Surgery in Moderate Myopia
|
|
Lee Min-Joung
Lee Sang-Mok
Lee Hyun-Ju
Wee Won-Ryang
Lee Jin-Hak
Kim Mee-Kum
|
|
|
Abstract
|
|
|
Purpose: To compare forward shift of posterior corneal surface and higher-order aberration (HOA) changes after LASIK, LASEK, and wavefront-guided LASEK surgery in moderate myopia
Methods: One hundred eighty four eyes undergoing LASIK, LASEK and wavefront-guided LASEK with VISX STAR S4 were included in this study. The posterior corneal elevation was measured with Orbscan before, 2 and 4 months after surgery. Changes of the elevation were assessed using the difference map generated from preoperative and postoperative elevation maps. The values of higher-order aberrations were evaluated preoperatively and 2 months postoperatively with Wavefront aberrometer.
Results: The posterior corneal surface displayed forward shift of 27.2±11.45 ?m, 24.3±9.76 ?m in LASIK group, 23.4±10.5 ?m, 23.6±10.55 ?m in LASEK group, 24.0±14.95 ?m, 28.4±14.72 ?m in wavefront- guided LASEK group at 2 months and 4 months, respectively. There were no statistically significant differences among those three groups, and between 2 and 4 months. The root mean score (RMS) of HOA was increased after LASIK and LASEK (p=0.000, p=0.000, respectively). The mean change of HOA-RMS was significantly smaller in wavefront-guided LASEK than LASIK or LASEK (p=0.000, p=0.000, respectively, Bonferroni-corrected).
Conclusions: The changes of posterior corneal surface forward shift showed no difference among LASIK, LASEK and wavefront-guided LASEK in moderate myopia. HOAs were significantly increased after LASIK and LASEK. The changes of HOAs were significant smaller in wavefront-guided LASEK than LASIK or LASEK.
|
|
|
KEYWORD
|
|
|
Aberration, LASEK, LASIK, Posterior corneal surface, Wavefront-guided ablation
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
   
|
|