Bartov E, Rock T, Treister G, Belkin M
Department of Ophthalmology, Edith Wolfson Medical Center, Tel-Aviv University, Holon, Israel.
Ophthalmic Surg Lasers. 1999 Jan;30(1):17-23.
This is the first report of clinical settings in which total internal reflection of laser light in eyes filled with silicone oil was observed. The authors analyze this phenomenon and outline the potential hazards it may present to patient, surgeon, and operating room personnel.
The authors observed significant reflection of laser light off the silicone-water interface both intraoperatively and in the clinic. The critical angle according to Snell's law (i.e., the angle at which total internal reflection occurs at the interface between silicone oil and vitreous) was calculated. The critical angle was found to be 71.9691 degrees(72 degrees).
An analysis of each of the clinical conditions where this phenomenon was observed is presented. Clinical and surgical implications are discussed.
The hazard of total internal reflection of laser light in eyes filled with silicone oil should be recognized by ophthalmologists to avoid possible complications. Techniques for overcoming and circumventing the difficulties resulting from this phenomenon are proposed.
本文首次报道了在充满硅油的眼中观察到激光全内反射的临床情况。作者分析了这一现象，并概述了其可能给患者、外科医生及手术室人员带来的潜在危害。
作者在手术过程中和临床中均观察到激光在硅油 - 水界面发生显著反射。根据斯涅尔定律计算了临界角（即在硅油与玻璃体界面发生全内反射的角度）。发现临界角为71.9691度（72度）。
对观察到这一现象的每种临床情况进行了分析，并讨论了其临床及手术意义。
眼科医生应认识到充满硅油的眼中激光全内反射的危害，以避免可能的并发症。文中提出了克服和规避这一现象所带来困难的技术方法。
