1. 水晶体：角膜(cornea)是一透明薄膜,形同镜片,负责 70% 的聚光力;虹膜(iris)根据光刺激眼睛的程度扩张与收缩瞳孔(pupil),控制进入的光量;水晶体(crystalline lens)则提供剩余 30% 光能的对焦能力,透过毛状体肌肉来控制水晶体的厚、薄以分别对近及远距离对焦;

2. crystalline lens的意思

2. 晶状体：crystal glasses 水晶镜 | crystalline lens 晶状体 | crystallizer 结晶器

3. 眼珠水晶体：crystalline humor 晶状体 | crystalline lens 眼珠水晶体 | crystalline quartz 晶状石英

4. 晶狀體(生理) = 晶狀體：crystal system 晶系 | crystalline lens 晶狀體(生理) = 晶狀體 | crystalline state 晶態

1. biconvex transparent body situated behind the iris in the eye
    its role (along with the cornea) is to focuses light on the retina

    Synonym: lenslens of the eye