| Comparison of Clinical Results of PRK with LASIK for Myopia between 3.00 & 7.75 Diopters. |
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H B Kim, Y S Kim, H W Tchah |
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Department of Ophthalmology, College of Medicine, University of Ulsan, Asan Medical Center. |
| - 3.0 디옵터에서 - 7.75 디옵터 사이의 근시환자에서 PRK 와 LASIK 의 결과 비교 |
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김호범(Ho Bum Kim),김용식(Yong Sik Kim),차흥원(Hung Won Tchah) |
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| Abstract |
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We evaluated the results of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) for the correction of myopia patients between-3.00 and -7.75 diopters(D)who were followed up for at least 6 months. PRK was performed on 35 eyes of 32 patients and LASIK on 32 eyes of 24 patients. At last follow-up period 94.3% of PRK group and 100% of LASIK group had an uncorrected visual acuity of 0.5 or better,74.3%of PRK group and 90.6% of LASIK group had an uncorrected visual acuity of 0.8 or better.Best corrected visual acuity was within 1 line of preoperative in all LASIK eyes, 1 eye (2.9%) of PRK eyes lost 2 line or more of preoperative at last follow-up. Mean spherical equivalent preoperatively was -5.56 +/- 1.06D, -5.62 +/-1.20D in PRK group and LASIK group respectively. Myopic regression had occured to -0.38 +/-0.67D, -0.35 +/-0.48D at 12 months postoper-atively. 82.9% of PRK group and 93.8%of LASIK group had refraction within +/-1.0D of emmetropia at last follow-up.There was no difference between uncorrected visual acuity and glare visual acuity at 1, 3 months postoperatively in both group. There was no significant contrast sensitivity change in both group.Corneal opacity increased progressively upto 3 months postoperatively in PRK group,but no eye had postoperative corneal opacity in LASIK group. Postoperative complication included 1 eye (2.9%) of irregular astigmatism in PRK group, 2 eyes (6.3%) of cap microwrinkle and 2 eyes (6.3%) of interface foreign bodies in LASIK group. Mean duration of postoperative pain was 2.61 +/-0.91 days, 0.59 +/-1.06 days in PRK group and LASIK group, respectively. We concluded that PRK and LASIK are both effective for correction between -3.00 and -7.75 diopters and need long term follow up about corneal opacity, myopic regression & complications. |
| Key Words:
Laser in situ keratomileusis;Myopia between 3.00 and 7.75 diopters Photorefractive keratectomy |
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