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眨眼是指眼睑短暂的一闭一开。除了入睡以外,人的眼睛总是经常、重复地眨着。有人做过研究,正常人一分钟眨眼10~20次,每次仅有0.3~0.4秒。成年人若3~5秒钟眨一次眼,一小时就眨近千次,一生当中竟高达3亿次之多。婴儿每隔2分钟才眨一次眼,随着年龄的增长,眨眼的频率也相应增多,直至成年人后方保持稳定。人之所以会眨眼,是因为眼睛上有上下两个眼睑(即眼皮)。其实,眼睑就是从前方保持眼
Blinking refers to the eyelid briefly closed. In addition to falling asleep, people’s eyes are always blinking repeatedly. Someone has done research, normal people blink 10 to 20 times a minute, each time only 0.3 ~ 0.4 seconds. If an adult blinks once in 3 to 5 seconds, it blinks once in an hour, reaching as much as 300 million times in her life. The baby blinks once every two minutes, and as she grows older, the frequency of blinking increases correspondingly until the back of the adult remains stable. The reason why people blink, because there are two upper and lower eyelids (that is, the eyelids). In fact, the eyelid is to keep the eye from the front