| Background and objectiveMyopia is quite common in place in today’s world, can be used to describe the word "popular". According to statistics, the global myopia in about1000000000of patients with. Myopia is related to the human race, gender, age, region, environment and other factors, there are obvious differences between different ethnic groups. Oriental Jews incidence of myopia, high myopia incidence rate is low, black. Asia is the world recognized myopia incidence regions, including China and Japan, the highest incidence. With the development of society, people’s living and learning conditions and patterns of change, so that the incidence of myopia increased gradually, the incidence of myopia in children and adolescents is ahead of the trend. In China, a country with a large population, a survey showed approximately30%people suffer from myopia, and showed a rising trend; the adolescent myopia patients accounted for about50%-70%, the vast majority of students. Myopia is not only to people in the life, work and learning brought a lot of trouble, also caused no small impact on people’s physical and mental health. With the rapid development of medical technology, the invention and application of modern refractive operation has become an effective way of myopia people regained good vision. Through technological innovation, continuous improvement, equipment operation mode of continuous improvement, there have been many refractive operation was born, in which LASIK has been seen as the "95%", namely,95%of the patients can not wear glasses or contact lens after operation, with good safety, effectiveness, predictability and become correction the mainstream of refractive error in operation. But with the extensive development of LASIK, a series of complications caused by the gradually placed in front of people, such as broken flap, free flap, button flap abnormal corneal flap, dry eye, refractive regression, glare, night vision loss, even macular hemorrhage. Thus, refractive operation is a double-edged sword, so it requires the refractive operation not only to improve eyesight, and to permit good visual quality! This study by observing the visual acuity, refraction, higher order aberrations, with fentosecond laser flap after LASIK surgery and postoperative complications and satisfaction survey method in patients with postoperative clinical evaluation of the patients after operation, further evaluation of the feasibility of fentosecond laser flap preparation as LASIK Jiao Zhengjin.MethodMethods from2011August, patients with-2012during August in the optometry center of our hospital were using femtosecond laser and mechanical microkeratome flap preparation LASIK correction of myopia and to review the conventional100cases (100eyes). The acceptance of femtosecond laser were divided into A group, as the experimental group; the lamellar knife treatment were divided into group B, as control group. All patients underwent refractive operation routine examination before operation, remove scar tissue, fundus lesions, inflammatory activity operation contraindications. Routine postoperative visual acuity, refraction, intraocular pressure examination, tear secretion, aberration, Hase formation, anterior segment and fundus, application of NIDEK OPD SCAN wavefront analyzer in the darkroom environment were measured before surgery, after10days, January, March, June when the aberration. The operation by a rich operation experience refractive surgeons. Postoperative follow-up, record data, statistical analysis was performed using SPSS13.0software. First, the data of two groups were normality test; to obey normal distribution data, comparison of paired t test before and after operation in the same group, compared with the independent samples t test between the two groups; for non-normal distribution data, such as the proportion of each group aberration by rank sum test. At the same time, postoperative patient satisfaction questionnaire. P<0.05for the difference had statistical significance. Result1. Preoperative examinations of the two groups had statistical difference between data: spherical, cornea and corneal flap thickness (P<0.05). There were no statistically significant differences between the other preoperative examination data (P>0.05).2. First days after operation were numerical group B visual acuity than A group, A group, postoperative visual acuity improved, all values are higher than those of B group showed no statistical difference; contrast visual acuity of each period of A group and B group after operation (P>0.05).3. First days of A group and B group after surgery residual diopter had significant difference (P<0.05); after first days and sixth months residual spherical equivalent in±0.50D range ratio had significant difference (P<0.05), A postoperative group in each period of residual spherical equivalent in scope than±0.50D example is always higher than that of B group.4. After surgery. A group and B group each aberration in different periods is compared to preoperative increased, significant difference compared with the period of aberration and the two groups before (P<0.05), mean postoperative B group of each aberration rate than A group.1>.Two groups of high order aberration increased after10days,1months with significant statistical difference (P<0.01).2>.Two groups of coma after tenth days of growth with significant statistical difference (P<0.01);1months after operation there was statistically significant difference (P<0.05).3>.Two groups of clover difference at the tenth day after operation, there was a significant difference in growth rate (P<0.01).4>.There was significant difference in10days, in January two group of spherical aberration after operation (P<0.01) after March there was statistically significant difference (P<0.05).5. Complications related to the operation: 1>. Abnormal corneal flap:A group and B group were0cases.2>. Cornea flap folds:1cases in A group, B group of0cases.3>. Decentered ablation:AO cases,0cases in group B.4>. Corneal flap around hemorrhage:3cases in A group, B group of2cases.5>. Corneal foreign bodies:1cases in A group, B group of2cases.6>. Subconjunctival hemorrhage:3cases in A group, B group of2cases.7>.glare:group A0cases, B group of lcases.8>.regression:FS group1cases, lamellar knife group of2cases.9>. dry eye:2cases of femtosecond group, lamellar knife group of4cases.10>.Haze:FS group0cases, lamellar knife group of1cases.Conclusions1.femtosecond laser flap preparation LASIK quick recovery of visual acuity, visual acuity, better to have better effectiveness.2.femtosecond laser flap preparation LASIK postoperative refraction more stable, less prone to regression of refraction.3. Aberration of smaller femtosecond laser flap after LASIK introduced.4. Femtosecond laser flap complications of LASIK is relatively small, high security. |
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