Min Jung Kee, An Jae Hwan, Yim Jin Ho
Department of Ophthalmology, Ulsan University Hospital, Ulsan University College of Medicine, 290-3 Jeonha-dong, Dong-gu, Ulsan 682-714, Republic of Korea.
Samsung Eye Clinic, Cheongju 361-270, Republic of Korea.
Int J Ophthalmol. 2014 Apr 18;7(2):345-9. doi: 10.3980/j.issn.2222-3959.2014.02.28. eCollection 2014.
To investigate the effects of a new opening pattern in neodymium:yttrium-aluminum-garnet (Nd:YAG) laser posterior capsulotomy on visual function.
This technique was conducted along a circular pattern. The energy ranged between 0.8 and 1.2 mJ/pulse was consumed and mean total energy levels were 74±21 mJ (mean±standard deviation: SD, from 40 to 167) and laser shots aimed at 150 µm away behind a datum point and went along an imaginary line which extends 0.5 mm inside from optic margin and into the circular en bloc pattern. Vitreous stands were attached with fragment and then they were cut off by the laser after circular application. The circular fragment was completely separated from vitreous, and then this fragment was quickly sunk in intravitreal space.
The follow-up period ranges from at least a week to 40mo, making 15.8mo on average. The procedural outcome showed 96% (74 eyes out of the 77 eyes) enhancement in patients' visual acuity. Cystoid macular edema or retinal detachment was not observed in any of the patients during follow-up periods.
This new technique is expected to improve the weaknesses that the conventional procedures have by adding the process to cut off vitreous stands attached with the fragment by the laser to the circular application.
探讨钕钇铝石榴石（Nd:YAG）激光后囊切开术新的开口模式对视觉功能的影响。
该技术沿圆形模式进行。消耗的能量范围为0.8至1.2 mJ/脉冲，平均总能量水平为74±21 mJ（平均值±标准差：SD，40至167），激光束瞄准距基准点后方150 µm处，并沿着从视神经边缘向内延伸0.5 mm并进入圆形整块模式的假想线进行。玻璃体条索附着有碎片，在圆形操作后用激光将其切断。圆形碎片与玻璃体完全分离，然后该碎片迅速沉入玻璃体内空间。
随访期至少为1周，最长为40个月，平均为15.8个月。手术结果显示患者视力提高96%（77眼中的74眼）。随访期间未观察到任何患者出现黄斑囊样水肿或视网膜脱离。
通过在圆形操作中增加用激光切断附着有碎片的玻璃体条索的过程，有望改善传统手术存在的不足。
