Binder P S, Lambert R W, Koepnick R G, Littlefield T R
Ophthalmology Research Laboratory, National Vision Research Institute, San Diego, California 92121, USA.
J Cataract Refract Surg. 1996 Nov;22(9):1175-88. doi: 10.1016/s0886-3350(96)80066-6.
To compare the morphologic appearance and measurements of in situ keratomileusis performed with the UniversalKeratome (UK) with those done with the Automated Corneal Shaper (ACS).
Surgical suite within private practice.
Procedures were performed the same day on mate eye-bank eyes. In situ keratomileusis was done using existing nomograms for each instrument to resect a cap thickness of 160 microns and a myopic resection of 100 microns. Intraocular pressures were increased by inflating the globes with balanced salt solution and were measured with the suction fixation rings in place. The excised caps and stromal resections were measured twice independently after surgery, again after tissue fixation, and then evaluated with light and scanning electron microscopy.
No complications were encountered. Compared with the ACS, the UK was easy to set up, use, clean, and take down. Its excised tissue dimensions were greater and more predictable, it resected a concave shaped lenticule (edges imperceptibly blending with the host stroma), and it created a smoother power resection surface and primary resection base.
Smoother, predictable tissue resection, and simple assembly/disassembly and use give the UK an apparent advantage over the ACS. The UK corrects astigmatism and hyperopia by changing the shape of the poly(methyl methacrylate) optical insert.
比较使用通用角膜刀（UK）与自动角膜塑形器（ACS）进行的原位角膜磨镶术的形态外观和测量结果。
私人诊所内的手术室。
在同一天对配对的眼库眼进行手术。使用每种仪器的现有列线图进行原位角膜磨镶术，切除的角膜瓣厚度为160微米，近视切削量为100微米。通过用平衡盐溶液使眼球膨胀来升高眼压，并在安装吸引固定环的情况下进行测量。术后对切除的角膜瓣和基质切削区进行两次独立测量，组织固定后再次测量，然后用光学显微镜和扫描电子显微镜进行评估。
未出现并发症。与ACS相比，UK易于设置、使用、清洁和拆卸。其切除的组织尺寸更大且更可预测，切除的是凹形透镜（边缘与宿主基质融合不明显），并且形成了更平滑的屈光切削表面和初始切削基底。
更平滑、可预测的组织切削，以及简单的组装/拆卸和使用，使UK相对于ACS具有明显优势。UK通过改变聚甲基丙烯酸甲酯光学植入物的形状来矫正散光和远视。
