Vignal R, Gastaud P, Izambart C, Daubas P, Freton A
Service d'Ophtalmologie, Hôpital Saint Anne, Toulon.
J Fr Ophtalmol. 2007 Mar;30(3):271-5. doi: 10.1016/s0181-5512(07)89589-1.
Monochromatic light accentuates details of different retinal layers because of its variable absorption and reflectance by structures both within and above these layers. Red-free light is little used, although it is an elementary method. Green-light ophthalmoscopy, with its short wavelength, enhances some fundus and vitreous structures and may make the examination of pathologic conditions (premacular pathology, vascular abnormalities, etc.) easier. Furthermore, it is often more comfortable for the patient.
单色光可突出视网膜不同层次的细节，这是因为它在这些层次内部和上方结构中的吸收和反射情况各不相同。无红光虽属基本方法，但很少使用。绿光检眼镜波长较短，能增强眼底和玻璃体某些结构的显示，可能使病理性情况（黄斑前病变、血管异常等）的检查更为容易。此外，对患者而言通常也更舒适。
