اثر ليزر نيديك و ميكروكراتوم كايرون بر اصلاح عيوب انكساري چشم

Effect of NIDEK Laser and Chiron Microkratomy for Correction of Visual Refractive Impairment

Assessment of LASIK for correction of Refractive Errors. Perspective interventional noncomparative case series, 399 eyes (264 patients) with Myopia - Myopia & Astigmatism and 17 eyes (10 patients) with Hyperopia were involved. All cases were operated with NIDEK EC- 5000 and Chiron Microkeratome. Regular follow up was done at a day, a WK, a month, 3 months, 6 months and a Year. There were 366 male and 233 female in-group of myopia and myopia with astigrnatism (Mean of Spherical Equivalent was-7,8+/-4.2 D). There were seven males and 10 females in-group of Hyperopia (MSEwas+5.3+/-1.3D). After six months follow up, 99 eyes at myopia group and 4 eyes at hyperopia group were available. In-group of myopia and myopia with astigmatism MSE was -2.7+/-2.3 D and in-group of hyperopia MSE was +3.15+/-3.34 D. After 6 months in myopia group 66.44% were within +/-1 D have targeted SE and 88.7% have UCVA better than or equal to 20/40. After 3 months in hyperopia group 16.6% were within +/-l D ofemmetropia and 100% have UCVA better or equal to 20/40, The mean of regression after 6 months in myopia group was +0.76+/-1.21 and in hyperopia group was -2.3+/-0.64. LASIK is an effective and safe way for reducing the amount of myopia and myopia-astigmatism, but with current algorithm undercorrection is high. Because of insufficient follow up and low number of participant we can not give a definite conclusion about hyperopia.