Dissertation
Dissertation > Medicine, health > Ophthalmology > Eye surgery and surgery > Retinal photocoagulation and laser eye surgery

The Clinical Curative Effect of Corneal Wavefront-guided Combining Q- Value Guided Aspheric Keratectomy Excimer Laser Subepithelial Keratomileusis for High Myopic of Relative Thin Corneal

Author ZhuYunXi
Tutor JinMin
School Guangzhou Medical College
Course Ophthalmology
Keywords High myopia Aspherical cutting Q value Higher-order aberrations Spherical aberration Coma Excimer laser subepithelial keratomileusis ( of LASEK ) Excimer laser in situ keratectomy (LASIK)
CLC R779.63
Type Master's thesis
Year 2010
Downloads 11
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Objective corneal wavefront aberration guided joint Q value optimized aspheric cutting excimer laser subepithelial keratomileusis (laser subepithelial keratomileusis, LASEK) with the standard the LASEK treatment of corneal relatively thin (usually the patient's corneal thickness ≦ 500μm ) the comparative study of clinical efficacy in patients with high myopia, and the joint Q value optimization guided by corneal wavefront aberration aspheric ablation the LASEK treatment of corneal relatively thin (usually the patient's corneal thickness ≦ 500 μm) of the patients with high myopia and corneal wavefront like The poor guide joint Q value the optimized aspheric cutting LASIK treatment of corneal relatively thick (usually the patient's corneal thickness ≧ 500 μm) clinical efficacy in patients with high myopia comparative study to investigate aspheric ablation the LASEK treatment of thin corneal clinical efficacy of high myopia. Aspherical the LASEK group: application aspherical cutting LASEK relatively thin 42 corneas of 23 cases of high myopia underwent refractive surgery. Standard Group: Applications standard LASEK relatively thin corneas of 21 patients with 40 corneal high myopia underwent refractive surgery. Aspherical the LASIK groups: application of aspherical cutting LASIK on 19 cases of 37 relatively thick corneas high myopia underwent refractive surgery. Study: patients with high myopia by contrast aspheric LASEK and standard the LASEK treatment of corneal relatively thin, two weeks after surgery, uncorrected visual acuity in January, March and June. 6 months after surgery, corneal topography, corneal wavefront aberration, visual contrast sensitivity and satisfaction surveys. Study 2: By contrast to the relatively thick high myopia and non-spherical cutting relatively thin aspheric the LASEK treatment of corneal LASIK treatment of corneal high myopia, were compared between the two groups after two weeks in January, March, June check uncorrected visual acuity . 6 months after surgery, corneal topography, wavefront aberration, visual contrast sensitivity and satisfaction surveys. Study: aspheric the LASEK group with standard the LASEK group of postoperative two weeks in January, March, June uncorrected visual acuity, the average analog corneal remember reading the (equivalent sinulated keratometry the e-SimK) equivalent value, coma, overall. aberration was no significant difference in the ball, Qs, Qf, non-glare visual contrast sensitivity (3cpd), the glare under visual contrast sensitivity (3cpd, 12cpd, 18cpd), patient satisfaction than in the standard group, the difference statistically significant. Study 2: aspherical LASEK group with aspheric cutting LASIK group after 2 weeks in January, March, June, uncorrected visual acuity was no significant difference in the postoperative June coma, spherical aberration, no glare visual contrast sensitivity the degree patient satisfaction were not statistically different. But the e-SimK, order aberrations, Qs, Qf, the glare under visual contrast sensitivity (18cpd) than Aspheric LASIK small, the difference was statistically significant. Conclusion the aspheric cutting LASEK, high myopia and the standard the LASEK treatment of corneal relatively thin aspherical cutting LASIK treatment of corneal relatively thick high myopia the Postoperative have good vision restored, higher safety, efficacy can be predictability. Aspherical cutting LASEK, postoperative can significantly reduce postoperative spherical aberration, Qs, Qf increases, reducing the contrast sensitivity abnormality, glare, night vision and the occurrence of the difference, preferably by keeping the corneal asphericity and aspherical cutting LASEK corneal thickness requirements than non-a spherical cutting the LASIK the postoperative clinical efficacy. Thin corneal enough line aspheric corneal thickness cutting LASIK patients an alternative treatment ametropia surgery

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