Autrata R, Holousová M, Rehůrek J
Ocní klinika FDN JGM, Brno.
Cesk Slov Oftalmol. 1997 Aug;53(4):252-60.
In a group of 1037 operated eyes the effectiveness, predictive value, stability and safety of photorefraction keratectomy by means of an excimer laser was tested in myopia (PRK) and astigmatism (PARK) with a two-year follow-up period after operation. The range of the preoperative refraction defect was -1.75 to -2.10 dpt (SE). The maximal value of the corrected cylinder in astigmatism was -6.0 cyl dpt. In the PRK group 459 operations were evaluated, in the PARK group 578 operations. Both groups are classified according to the spherical equivalent of the refractory defect into three groups. Group A is formed by myopia up to -6.0 dpt, group B myopia -6.25 to -10.0 dpt and group C above -10.25 dpt. Non-corrected visual acuity 6/12 and better was recorded in the 20th month after operation in group A in 93.4-97.6% (PARK-PRK) operated eyes, in group B 88.7-91.5% and in group C 61.2-68.4% of operated eyes. The achieved final refraction (SE) in an interval +(-1.0) dpt from the originally planned one was recorded during the 20th month after operation in group A in 92.8-96.5% (PARK-PRK) operated eyes, in group B 73.5-78.9% and in group C 59.7-63.5% operated eyes. The best corrected visual acuity (NKZO) in the whole group 20 months after operation was unaltered or better by 1 line of projected optotypes as compared with NKZO before operation in group A in 97.6%, in group B in 94.3% and in group C in 89.7% operated eyes. The analysis of results in PRK and PARK in the group with a two-year follow-up period after operation permits to evaluate the method as sufficiently effective and safe for correction of myopia up to -10.0 dpt but less predictive in myopia above -10.0 dpt.
在一组1037只接受手术的眼睛中，通过准分子激光进行的光折射角膜切削术（PRK）治疗近视和散光性角膜切削术（PARK）的有效性、预测价值、稳定性和安全性在术后进行了为期两年的随访测试。术前屈光不正的范围为-1.75至-2.10屈光度（SE）。散光中矫正柱镜的最大值为-6.0柱镜屈光度。在PRK组中评估了459例手术，在PARK组中评估了578例手术。两组均根据屈光不正缺陷的球镜等效值分为三组。A组由近视度数高达-6.0屈光度的患者组成，B组为近视度数-6.25至-10.0屈光度的患者，C组为近视度数高于-10.25屈光度的患者。术后第20个月，A组93.4 - 97.6%（PARK - PRK）的手术眼记录到未矫正视力达到6/12及以上，B组为88.7 - 91.5%，C组为61.2 - 68.4%。术后第20个月，A组92.8 - 96.5%（PARK - PRK）的手术眼记录到最终屈光（SE）在距原计划值±1.0屈光度的范围内，B组为73.5 - 78.9%，C组为59.7 - 63.5%。术后20个月，全组最佳矫正视力（NKZO）与术前相比，A组97.6%的手术眼未改变或提高了1行预计视标，B组为94.3%，C组为89.7%。对术后两年随访期的PRK和PARK结果分析表明，该方法对于矫正近视度数高达-10.0屈光度是足够有效和安全的，但对于近视度数高于-10.0屈光度的预测性较差。
