改良去瓣Epi-LASIK與LASIK治療高度近視的臨床與實(shí)驗(yàn)室檢查的對(duì)比研究
[Abstract]:Objective: To observe the clinical efficacy and laboratory results of Epipolis laserin-situ keratomileusis (Epi-LASIK) and excimer laser in situ keratomileusis (Laser in situkeratomileusis, LASIK) in the treatment of high myopia, and compare the corneal irritation symptoms in two groups. The changes of naked eye vision, corneal epithelial healing, HAZE, tear film and corneal topography were discussed, and the difference between the two surgical methods was discussed, which provided a reference for the refractive surgeon to choose the operation mode according to the individual condition.
Methods: 42 cases of high myopia (84 eyes) were selected in our hospital from July 2011 to March 2012. 38 patients (76 eyes) with high myopia in LASIK operation were followed up for 1 years after operation. The corneal irritation symptoms of 1D, 3D, 5D, 7d patients after operation, naked eye vision and corneal epithelium healing were observed, HAZE scores in 1m, 3M, 6m, 12m two after operation were observed. The visual acuity of the eyes, tear film rupture time, tear secretion, tear fern test and corneal topography were observed before and after operation in 1m, 3M, 6m, 12m two groups.
Results: the scores of corneal irritation symptoms after 1. were compared, and there were significant differences in 1D and 3D two groups after operation (t=-6.18, t=-4.51, P < 0.05), and there was no statistical difference between groups of 5D and 7d two after operation (t=-1.94, t=-1.35, P > 0.05).
The time of corneal epithelial healing after 2. was compared in group LASIK (1.66 + 0.62) D and (4.93 + 0.80) d in the modified group Epi-LASIK group. The difference between the two groups was statistically significant (t=-28.56, P < 0.05).
Compared with Uncorrected visual acuity UCVA after 3. operation, the differences of 1D, 3D and 5D in the two groups were statistically significant (t=11.34, t=13.96, t=4.04, P < 0.05), and there was no significant difference in postoperative 7d.
After 4. 1m, 3M, 6m, and 12M, there was no significant difference in the visual acuity between the two groups (t=0.87, t=0.98, t=1.40, t=-1.17, P > 0.05). There was no significant difference in the diopter difference (P > 0.05).
After 5., there was a significant difference in the formation of HAZE between the 3M two groups (x ~2=4.64, P < 0.05), and there was no statistical difference between 1m, 6m, and 12m HAZE after the operation (x ~2=2.75, Chi ~2=1.82, Chi ~2=0.91, P > 0.05).
After 6., there was no significant difference in visual quality questionnaire between groups of 15d and two groups (t=1.86, P > 0.05). The scores of visual quality questionnaire among groups of 1m, 3M, 6m, 12m two after operation were statistically significant (t=2.03, t=3.49, t=3.98, t=3.75, P < 0.05).
7. before and after the operation, there was no significant difference in the tear secretion test between the 1m two groups (t=-0.48, t=-1.75, P > 0.05), and the postoperative 3M, 6m, and 12m two groups were statistically significant (t=-8.68, t=-12.79, t=-10.94, P < 0.05). T=22.56, t=18.40, t=14.88, P < 0.05). The difference in the secretion of 3M tear secretion between the modified Epi-LASIK group and the Epi-LASIK group was statistically significant (t=29.20, t=28.32, P < 0.05) and 6m after operation. There was no significant difference between 12m and before operation (0.05).
8. the tear film rupture time between the two groups was not statistically significant (P > 0.05). There were significant differences in 1m, 3M, 6m, and 12m between groups after operation (P < 0.05), and 1m, 3M, 6m, and 12m tear film rupture time after operation in group LASIK, and the difference of tear ferns were statistically significant (P < 0.05) respectively (P < 0.05). The time of tear film rupture in 1m and 3M after operation in group Epi-LASIK was statistically significant (P < 0.05). There was no statistical difference between 6m, 12m and before operation (P > 0.05).
9. the corneal surface asymmetry index (Surface Asymmetry Index SAI) between the two groups before operation, and there was no statistical difference between the corneal surface regularity index (Surface Regularity Index SRI) (t=0.57, t=-1.31, P > 0.05). There was no statistically significant difference in the value of 6m SRI (P > 0.05), and there was significant difference in 12m SAI value in group LASIK and modified Epi-LASIK group (P < 0.05), and there was no significant difference in the postoperative 1m, 3M, 6m SAI value. There was significant difference in the value of 1m and 3M SRI before and after the operation of Epi-LASIK (P < 0.05). There was no significant difference in the value of 6m, 12m SRI (P > 0.05). There was a statistically significant difference between the preoperative and postoperatively 1m, 3M, and postoperatively. The significance of study (P < 0.05) was not significantly different from that of postoperative 12m SAI (P > 0.05).
1. Compared with LASIK, modified flap-removal Epi-LASIK has more severe corneal irritation symptoms, slower visual recovery and longer epithelial healing time in patients with high myopia.
2. there was no significant difference in the occurrence of HAZE between the improved Epi-LASIK group and the LASIK group except for 3M, and the long-term visual acuity could achieve the same effect.
3. the early postoperative tear film stability decreased, tear secretion decreased and tear ferns crystallinity grade level and SRI and SAI value increased in the two groups of improved decidal Epi-LASIK group and group LASIK. With the time lapse the above indexes gradually recovered. The modified tear film injury and the regular repair of the angle membrane and the visual quality were superior to those of the LASIK group.
【學(xué)位授予單位】:南華大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類號(hào)】:R778.11
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