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有的人白天目光敏锐,视力完全正常,但到傍晚或光线暗的地方就看不清,甚至模糊一片。这就是俗称的“雀蒙眼”,古医书上叫“雀目”,现代医学称为“夜盲”。你注意到这种情况吗?麻雀一到黄昏便两眼昏黑,停立不动;而猫头鹰一到夜间便高频率地捕捉老鼠。这是怎么回事呢?原来麻雀眼睛里(视网膜)的视觉细胞是短而粗的圆椎形状,而猫头鹰眼里的视觉细胞全是细而长的杆状。这两种形状不同的细胞在功能上也
Some people have sharp eyes during the day and their eyesight is completely normal. However, they can not see clearly or even vaguely in the evening or dark places. This is commonly known as “Blindfold”, the ancient medical book called “bird eyes”, modern medicine called “night blindness.” Did you notice this? The sparrows were darkened at dusk and stopped, and the owl caught the rat with high frequency at night. What is going on? The original visual cells in the sparrow’s eyes (retina) are short, thick vertebra shapes, while the owl’s eyes are full of thin, long rods. The two different shapes of cells are also functionally