Suomalainen V P, Viherkoski E, Immonen I
Department of Ophthalmology, Helsinki University Hospital, Finland.
Acta Ophthalmol (Copenh). 1991 Dec;69(6):776-81. doi: 10.1111/j.1755-3768.1991.tb02059.x.
Transcleral contact retinal krypton laser photocoagulation of the retina was studied in rabbit eyes. The laser application was performed under indirect ophthalmoscope visual control with indentation of the sclera by the laser probe. Retinal lesions were produced with powers ranging from 0.2 to 0.3 W and application times between 1 and 2 sec. The lesions were studied histologically 2, 5, 10, 12, 20, 30 and 70 days after treatment. Histopathological examination of the lesions showed damage of mainly the outer retinal layers in light lesions, and to all layers of the retina in the more intense lesions. No scleral damage was observed in the light lesions, whereas transient oedema of the inner sclera was seen in the intense lesions. Studies with enucleated rabbit eyes showed that indentation of the sclera by the laser probe substantially decreased the power needed to produce a retinal lesion. It is concluded, that when used with scleral indentation, transscleral krypton laser photocoagulation of the retina can be performed with minimal damage to the sclera.
在兔眼中研究了经巩膜接触式视网膜氪激光光凝术。激光照射在间接检眼镜视觉控制下进行，激光探头压迫巩膜。使用功率范围为0.2至0.3瓦、照射时间为1至2秒产生视网膜病变。在治疗后2、5、10、12、20、30和70天对病变进行组织学研究。病变的组织病理学检查显示，轻度病变主要损伤视网膜外层，重度病变则损伤视网膜各层。轻度病变未观察到巩膜损伤，而重度病变可见巩膜内层短暂水肿。对摘除的兔眼进行的研究表明，激光探头压迫巩膜可显著降低产生视网膜病变所需的功率。得出结论，当与巩膜压迫一起使用时，经巩膜氪激光视网膜光凝术对巩膜的损伤最小。
