Miyashiro M J, Yee R W, Patel G, Karas Y, Grene R B
Department of Ophthalmology and Visual Science, University of Texas Medical School at Houston, 77030, USA.
Am J Ophthalmol. 1998 Dec;126(6):825-7. doi: 10.1016/s0002-9394(98)00241-4.
To report three patients who underwent the lasso procedure to revise overcorrection with radial keratotomy.
Case report and review of the literature.
Four eyes of three patients who had undergone radial keratotomy with resultant hyperopic overcorrection underwent a lasso procedure. Before the procedure, average cycloplegic refraction spherical equivalent was +3.656 +/- 1.352 diopters, and average manifest refraction spherical equivalent was +2.250 +/- 0.621 diopters. A 10.0 monofilament nylon suture was placed in a circumferencial manner through the corneal stroma and overlapping the old radial keratotomy incisions. At 1 month postoperatively, best-corrected visual acuity was 20/20 in all four eyes, with average cycloplegic refraction spherical equivalent +0.438 +/- 1.423 diopters and average manifest refraction spherical equivalent -0.156 +/- 1.147 diopters. Mean delta cycloplegic refraction spherical equivalent was 3.219 +/- 1.724.
The lasso procedure provides an immediate solution for symptomatic overcorrected hyperopic eyes after radial keratotomy. Predictability and long-term stability necessitate further follow-up.
报告3例接受套索手术以矫正放射状角膜切开术所致过矫的患者。
病例报告及文献复习。
3例接受放射状角膜切开术导致远视过矫的患者的4只眼接受了套索手术。手术前，平均睫状肌麻痹验光球镜等效度为+3.656±1.352屈光度，平均显验光球镜等效度为+2.250±0.621屈光度。用10.0单丝尼龙缝线以环形方式穿过角膜基质并与原放射状角膜切开术切口重叠。术后1个月时，4只眼的最佳矫正视力均为20/20，平均睫状肌麻痹验光球镜等效度为+0.438±1.423屈光度，平均显验光球镜等效度为-0.156±1.147屈光度。平均睫状肌麻痹验光球镜等效度差值为3.219±1.724。
套索手术为放射状角膜切开术后有症状的远视过矫眼提供了一种即时解决方案。可预测性和长期稳定性需要进一步随访。
