Binder P S, Bosem M, Weinreb R N
National Vision Research Institute, San Diego, California, USA.
J Cataract Refract Surg. 1996 Mar;22(2):205-12. doi: 10.1016/s0886-3350(96)80220-3.
To describe a method for analyzing Scheimpflug anterior segment images for a new measure of the cornea's response to excimer laser photoablation.
Mericos Eye Institute, Scripps Memorial Hospital, La Jolla, California.
Digitized Scheimpflug anterior segment photographs of operated and unoperated eyes were obtained in 17 patients 1 to 15 months after photorefractive keratectomy (PRK). The images were analyzed to determine their dimensions. Each imaged opacity was compared with corneal haze observed by slitlamp biomicroscopy, intended ablation depth, postoperative corneal thickness, and refractive error change.
All postoperative corneas displayed a nonhomogeneous, meniscus-shaped pattern in the ablated area that ranged from 17 to 40% of corneal thickness. This pattern correlated poorly with intended laser ablation depth.
This technique provides a new assessment of corneal response to PRK. Improvements in software analysis may facilitate quantitative assessment.
描述一种分析Scheimpflug眼前节图像的方法，以用于衡量角膜对准分子激光光凝切削的反应的新指标。
加利福尼亚州拉霍亚市斯克里普斯纪念医院梅里科斯眼科研究所。
对17例接受准分子激光角膜切削术（PRK）后1至15个月的手术眼和未手术眼进行数字化Scheimpflug眼前节照相。分析图像以确定其尺寸。将每个成像的混浊与裂隙灯生物显微镜观察到的角膜混浊、预期的切削深度、术后角膜厚度和屈光不正变化进行比较。
所有术后角膜在切削区域均呈现不均匀的半月板形图案，范围为角膜厚度的17%至40%。该图案与预期的激光切削深度相关性较差。
该技术为评估角膜对PRK的反应提供了一种新方法。软件分析的改进可能有助于定量评估。
