Relatively speaking, three table mirror material all have advantages and disadvantages: plastic lens relative are not afraid to fall;
相对来说，三种表镜的材质各有优缺点：胶镜相对不怕摔；
Methods:Indirect ophthalmoscope and three mirror contact lens were used to exam the retina.
方法：用间接眼底镜及三面镜检查眼底视网膜。
Methods:Indirect ophthalmoscope and three mirror contact lens were used to exam the retina.
方法：用间接眼底镜及三面镜检查眼底视网膜。
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