CLINICAL ANALYSIS OF EXCIMER LASER PHOTOREFRACTIVE KERATECTOMY FOR TREATMENT OF MYOPIA AND MYOPIC ASTIGMATISM

To evaluate the efficacy and accuracy of photorefractive keratectomy (PRK) for myopia and myopic astigmatism .SVS APEX excimer laser with a wave length of 193 nm(Sumit Technology Inc. Waltham, Mass, USA) was applied. 316 myopic eyes of 168 patients were treated with PRK between September, 1996 and October, 1997, and 260 eyes (84%) of 150 patients were followed for more than three months, including male 68(116 eyes, 401%) and female 82(144 eyes, 599%). The preoperative spherical equivalent refractive errors ranged from -125D to -1000 (mean -467163D), and astigmatism ranged from 0 to -200D (means -033045D). We divided the patients into two groups according to the referaction: group A (from -125D to -590D) and group B(from -600 to -1000D). The number of eyes in the two groups were 220 and 40 respectively. In group A, on the 10th day, 689% has the uncorrected visual acuity (UCVA) equal to or one line better or lower than the preoperative best corrected visual acuity (BCVA). In 1,3,6 and 12 months, 90 %, 96%, 95% and 94% had the UCVA equal to or one line better or lower than the preoperative BCVA respectively. In group B, on the 10 th day, in 1,3,6 and 12 months, UCVA equal to or one line better or lower than the preoperative BCVA occurred in 359%, 83%, 87%, 86%, and 84% of the cases respectively. Most of the haze showed 051 grades except 3 eyes with the haze of 2 grade in 3 or 6 months and it changed to 1 and 05 grade respectively within one year. In 10 days and 1,3,6,12 months postoperatively, the corneal haze was noted in 329%, 848%, 628%,90% and 28% of the treated eyes respectively. We found that 193 nm excimer laser PRK was a predictable, safe, stable, and effective refractive surgery for correcting myopia up to -1000D in Chinese patients, and the effect was better in myopia lower than -600D.

准分子激光光学性柱镜矫治术治疗单纯性近视散光临床疗效分析

目的 评价准分子激光光学性柱镜矫治术 (photoastigm atic refractive keratectom y,PARK)治疗单纯近视性散光的疗效。方法 7例 (9眼 )平均单纯近视性散光度为 - 2 .6 9± 1.0 4D,角膜散光 2 .5 0± 0 .72 D。实施PARK后随访 12～ 2 4个月。对术后视力、角膜表面形态及角膜散光的改变进行临床分析。结果 9眼单纯近视性散光术后裸眼视力为 1.0 7± 0 .14,角膜散乐 1.16± 0 .0 9D。无角膜 Haze、“眩光”和上皮的并发症。结论 PARK治疗单纯近视性散光安全、临床疗效好。

准分子激光角膜切削术治疗近视和近视散光的临床研究

目的为评价准分子激光角膜切削术矫正近视的结果。方法应用ＳＶＳＡＰＥＸ型准分子激光治疗仪对１５０例（２６０只眼）近视患者进行准分子激光角膜切削术，并对随诊的患者进行观察。分别于术后１０ｄ，１、２、３、６、１２月就视力、屈光度、眼压、角膜透明度、角膜地形图进行随访评估。１５０例（２６０只眼）近视患者术前等值球镜屈光度为－１２５～－１０００Ｄ（－４６７±１６３Ｄ），散光０～２００Ｄ（－０３３±０４５Ｄ）；按屈光度分为两组：Ａ组（－１２５～－５９０Ｄ），Ｂ组（－６００～－１０００Ｄ）。结果Ａ组术后第１０ｄ，有６８９％裸眼视力达到矫正视力，１月、３月、６月和１２月分别为９０％、９６％、９５％和９４％。Ｂ组术后第１０ｄ，有３５９％裸眼视力达到矫正视力，１月、３月、６月和１２月分别为８３％、８７％、８６％和８４％。１ａ时，裸眼视力≥０５、０８、１０者，在全组分别为９９３％、９５６％、９１３％；在Ａ组分别为１００％、９８８％、９４７％；在Ｂ组分别为９５５％、９０２％、６８５％。其中，术后全组最佳矫正视力下降１行或２行者分别为６６％和０％。全组仅３只眼（０６４％）除外，均为?

准分子激光角膜切削术治疗近视140例

目的:观察准分子激光角膜切削术治疗近视的临床结果。方法:采用美国Keracor116型准分子激光治疗机对140例患者角膜行准分子激光角膜切削。结果:共进行140例。术后裸眼视力≥0.5者138例(98.6%);≥0.8者136例(97.1%);≥1.0者132例(94.3%);术后并发症轻微,主要有角膜上皮下雾状混浊-屈光回退和激素性高眼压。结论:准分子激光角膜切削是治升近视的一种安全、有效的治疗方法。

准分子激光角膜切削术治疗近视和近视散光的临床研究(英文)

目的 评价准分子激光角膜切削术矫正近视的结果。方法 我院自1996年9月到1997年10月,应用SVSAPEX型(SummitTechnologyInc.USA)准分子激光治疗仪,对168例近视患者(316只眼)行PRK手术,对其中的150例(260只眼,占84%)患者随诊至少3mo以上,最长1a;男68例(116只眼,占40.1%),女82例(144只眼,占59.9%)。150例(260只眼)近视患者术前等值球镜屈光度为-1.25～-10.00D(-4.67D±1.63D),散光0～-2.00D(-0.33D±0.45D);按屈光度分为两组:A组(-1.25～-5.90D),B组(-6.00～-10.00D)。结果 A组术后第10天,有68.9%(132/220)裸眼视力达到矫正视力,1、3、6和12mo分别为90%、96%、95%和94%.B组术后第10天,有35.9%(13/40)裸眼视力达到矫正视力,1、3、6和12mo分别为83%、87%、86%和84%.全组仅3只眼(0.64%)除外,均为0.5～1.0级的角膜上皮下雾状混浊,其出现的百分比手术后10d和1、3、6、12mo分别为32.9%、84.2%、62.4%、9.0%和2.8%.结论 提示准分子激光角膜切削术治疗-10.00D以内的近视是一种安全有效、稳定性好、预测性强的方法,-6.00D以下效果更好。