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眼力是指一个人透彻的观察能力和敏锐的辨别能力,但其本义是指一个人的视物能力。我们可以看到物体,这是眼睛的功能;如果我们要看清物体,这就需要眼力了。我们是如何看到外界物体的外界物体发出或反射的光线通过角膜、房水、瞳孔、晶状体、玻璃体,最后到达视网膜。视网膜上有感光细胞,包括感受弱光的视杆细胞以及感受颜色和强光的视椎细胞。感光细胞将光信号转化为电信号,再将信号传递给双极细胞,然后双极细胞将信号传递给神经节细胞。
Eyesight refers to a person’s thorough observation ability and sharp discrimination ability, but its original meaning refers to a person’s visual ability. We can see the object. This is the function of the eye. If we want to see the object, this requires eye contact. How do we see the light emitted or reflected by the external objects of the external objects through the cornea, aqueous humor, pupil, lens, vitreous body, and finally reach the retina. Retinal photoreceptor cells, including the perception of weak light rod cells and feel the color and light of the vertebral cells. Photoreceptors convert light signals into electrical signals, which are then transmitted to bipolar cells, which then transmit the signals to ganglion cells.