The optic disc is a blind spot because no light receptor cells are present in this area of the retina where the optic nerve and retinal blood vessels leave the back of the eye.
视盘是个盲点，因为视网膜的这个区域没有光感细胞，视神经和视网膜血管从眼睛后面的这个部位伸出去。
The effective incident rays entered the eye from different parts of the reflection disc according to their incident angles.
有效投射光线依照其投射角，由光斑的不同部位进入眼中。
A curious trait they all share is that they have only one eye: a large, pupil-less disc, red and glowing.
他们所共有的一个有趣的特征就是他们只有一只眼睛：一只巨大的、没有瞳孔的、散发着红光的眼睛。
A curious trait they all share is that they have only one eye: a large, pupil-less disc, red and glowing.
他们所共有的一个有趣的特征就是他们只有一只眼睛：一只巨大的、没有瞳孔的、散发着红光的眼睛。
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