One was exacrated through scleral incision after electric coagulation at the lesion of the sac with ophthalmosco-py and optic fiber.

• 前者通过眼底镜用导光纤维于囊泡外缘电凝定位,从相应的巩膜面作切口;后者则通过“玻切术”的冷冻法切除。