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会诊科室:屈光。近视激光原位角膜磨镶术后连续远视。

Consultation Section: Refractive. Consecutive hyperopia after myopic laser in situ keratomileusis.

出版信息

J Cataract Refract Surg. 2020 Mar;46(3):485-490. doi: 10.1097/j.jcrs.0000000000000152.

Abstract

A 31-year-old woman was seen at our clinic with dissatisfying hyperopic error after a myopic laser treatment of her left eye in April 2018. The surgery took place 1 year previously. There were no abnormalities in her medical history.The preoperative corrected distance visual acuity (CDVA) in the left eye was 20/16 with -7.50 -0.50 × 75. The refraction in the right eye was -3.50 -1.25 × 90. The cycloplegic correction of the left eye preoperatively was -6.50 -0.50 × 68. A femtosecond-assisted laser in situ keratomileusis procedure was performed with an optical zone of 6.3 mm, an ablation zone of 7.97 mm, and a maximum ablation depth of 121 μm. The laser was set at a correction of -7.50 -0.5 × 75. The temperature and humidity during the laser treatment were 20 degrees and 47%, respectively. shows the excimer laser treatment data (AMARIS 750, SCHWIND eye-tech-solutions).At 1 week postoperatively the uncorrected distance visual acuity (UDVA) was 20/25, and at 1 month postoperatively the CDVA was 20/16 with +2.50. Slitlamp examination showed a clear cornea. No corneal topography was made at that timepoint. At referral 7 months later, the patient's UDVA was 20/100 and CDVA was 20/16 with +2.50 -1.25 × 140 in the left eye. The patient reports decreased vision since the treatment in 2018 and wants to see better without spectacles. shows the postoperative Scheimpflug topography of the left eye, flat keratometry (K1) 36.1 @ 178.4 and steep keratometry (K2) 36.6 @ 88.4. What do you believe could be the cause of this overcorrection? What is your advice in terms of correction of the refractive error for this patient?

摘要

一位 31 岁女性于 2018 年 4 月左眼行近视激光手术后出现远视欠矫,来我院就诊。该手术于 1 年前进行,患者无特殊病史。左眼术前最佳矫正远视力(BCVA)为 20/16,矫正屈光度为-7.50-0.50×75°。右眼术前矫正屈光度为-3.50-1.25×90°。术前左眼睫状肌麻痹验光结果为-6.50-0.50×68°。行飞秒激光辅助准分子原位角膜磨镶术,光学区 6.3mm,切削区 7.97mm,最大切削深度 121μm。激光设定矫正屈光度为-7.50-0.5×75°。术中激光治疗时温度和湿度分别为 20℃和 47%。图 1 显示准分子激光治疗数据(AMARIS 750,SCHWIND eye-tech-solutions)。术后 1 周,裸眼远视力(UDVA)为 20/25,术后 1 个月,BCVA 为 20/16,+2.50。裂隙灯检查示角膜透明。当时未行角膜地形图检查。术后 7 个月就诊时,患者左眼 UDVA 为 20/100,BCVA 为 20/16,+2.50-1.25×140。患者自述自 2018 年治疗后视力下降,希望不戴眼镜看得更清楚。图 2 显示左眼术后 Scheimpflug 地形图,平 K 值(K1)36.1@178.4,陡 K 值(K2)36.6@88.4。你认为这种过矫的原因可能是什么?对于该患者的屈光不正矫正,你有什么建议?

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