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为探讨以平头光纤经巩膜睫状体行Nd:YAG光凝的可行性,对离体猪眼进行了实验研究,并就这种光凝方法所需的能量及其安全性和有效性,与采用微透镜聚焦头光凝进行了对比。结果表明,后者光凝能量达15 J(15W,1.0S)时,可明显破坏睫状体而巩膜无碳化;前者获得最佳光凝效果的能量为5J(10W,0.5S)。讨论了光凝造成巩膜损害的原因。推断:以平头光纤经巩膜睫状体对活体人眼施行接触式Nd:YAG光凝是可行的。
In order to investigate the feasibility of using Nd: YAG photocoagulation through a scleral ciliary body with a flat fiber, the porcine ex-vivo experiments were carried out. The energy required for this photocoagulation and its safety and efficacy were compared with Using micro-lens focusing head photocoagulation were compared. The results show that the latter photocoagulation energy of 15 J (15W, 1.0S) can significantly damage the ciliary body without scleral carbonization; the former to obtain the best photocoagulation energy of 5J (10W, 0.5S). The causes of sclera damage caused by photocoagulation are discussed. It is concluded that contact Nd: YAG photocoagulation is feasible for living human eyes with a flat-fiber optic transscleral ciliary body.