这些离子通道都有的一部分，就是所谓的选择性过滤器，这个过滤器，会滤过允许穿过的离子。
What all of these channels have is what's called a selectivity filter, so this filter filters out the type of ion that's going to be allowed through.
结果对已经丧失视功能的上述患者行颞下方睫状体平坦部前玻璃体抽吸切除联合巩膜瓣下滤过性手术，术后18月眼压正常。
Results IOP was normal during 18 months after performed anterior vitreous aspiration in the inferotemporal regions of pars plana combined with filtration surgery for the vision loss patient.
目的从动物实验方面观察睫状体平坦部滤过术降眼压效果及对眼部组织学影响。
OBJECTIVE to investigate the effects of reducing intraocular pressure by pars plana filtration technique on glaucoma model, and to further study its effects on ocular region histopathology.
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