Corrective effect of femtosecond laser assisted laser in situ keratomileusis Xtra on patients with moderate to high myopia after 2a postoperatively
10.3980/j.issn.1672-5123.2024.2.22
- VernacularTitle:FS-LASIK Xtra治疗中高度近视患者术后2a的矫正效果
- Author:
Jinxiao LI
1
,
2
,
3
,
4
,
5
;
Di SHEN
1
,
2
,
3
,
4
,
5
;
Kun ZHOU
1
,
2
,
3
,
4
,
5
;
Xiyu SUN
1
,
2
,
3
,
4
,
5
;
Yani WANG
1
,
2
,
3
,
4
,
5
;
Wei WEI
1
,
2
,
3
,
4
,
5
Author Information
1. The First Affiliated Hospital of Northwestern University
2. Xi'an No.1 Hospital
3. Shaanxi Institute of Ophthalmology
4. Shaanxi Key Laboratory of Ophthalmology
5. Clinical Research Center for Ophthalmology Diseases of Shaanxi Province, Xi'an 710001, Shaanxi Province, China
- Publication Type:Journal Article
- Keywords:
femtosecond laser assisted laser in situ keratomileusis(FS-LASIK);
accelerated corneal cross-linking(Xtra);
myopia;
corneal curvature
- From:
International Eye Science
2024;24(2):295-300
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To evaluate corrective effect and stability of corneal morphology in patients with moderate to high myopia after 2a treatment of femtosecond laser assisted laser in situ keratomileusis(FS-LASIK)Xtra.METHODS:Retrospective case-control study. A total of 30 cases(58 eyes)Patients with moderate to high myopia combined with astigmatism who planned to undergo refractive surgery in our hospital from August 2019 to August 2020 were included, and different types of surgery were performed respectively based on the relevant index of keratoconus screening in the preoperative corneal topography. They were divided into FS-LASIK group and Xtra group, with 15 cases(29 eyes)in each group. Uncorrected visual acuity(UCVA), best corrected visual acuity(BCVA), spherical equivalent(SE)and the corneal curvature of the anterior and posterior surfaces of different diameters(3, 5 and 7 mm)measured by Sirius three-dimensional corneal topography were observed preoperatively and 3 mo, 1 and 2 a postoperatively.RESULTS: The UCVA of the two groups of patients at different time points after surgery was significantly increased compared with preoperatively(both P<0.01), and there was no difference in UCVA and SE between the two groups(P>0.05). After 2 a postoperatively, residual astigmatism was -0.25-0 D in 25 eyes(86%)of the FS-LASIK Xtra group and 24 eyes(83%)of the FS-LASIK group. The actual corrected SE and expected corrected SE of both groups were positively correlated(both P<0.05). There were differences in corneal curvature on the surface of different diameter areas(3, 5, and 7 mm)between the two groups at 3 mo, 1, and 2 a postoperatively compared with preoperatively. After 1 and 2 a postoperatively, the corneal posterior surface curvature of the FS-LASIK Xtra group with corneal diameter of 3 and 5 mm was higher than that of the FS-LASIK group(P<0.05).CONCLUSIONS:FS-LASIK Xtra has good safety, efficacy and predictability in correcting patients with moderate to high myopia.
