What's with dilated pupils? 1. Adjust the light.
Pupils can adjust the light and shade, and have different reactions under different light, making it easier and more convenient for eyes to see things. Pupil contraction is relatively strong, and the changing atmosphere is relatively large. The smallest diameter may be less than 1 mm, and the largest diameter may be greater than 9 mm. If the light is strong, the pupil will not become smaller, and if the light is weak, the pupil will become larger.
2. See the object of admiration
Both men and women will be more excited when they see the object they like, and even their hearts will speed up. At this time, their pupils will become bigger, which is normal.
Step 3 protect yourself
Pupils are dilated sometimes because of emotional changes and sometimes to protect themselves. If we study this aspect, we can understand a person's actual thoughts by observing other people's eyes, but the pupil is round no matter whether it gets bigger or smaller, and there will be no other shape.
4. Brain diseases
If you get some diseases, especially brain diseases, it may lead to abnormal pupils. In life, many people may use drugs to artificially dilate their pupils when checking their eyesight, so as to better determine their eyesight.
5. Psychological activities
In addition, psychological activities may also affect the pupils. If you are excited, your pupils will become very big. If you can't feel the pupil, there will be no change.
6. Death
This is a scene often described in TV series, and it also has certain practical significance. If a person dies and his body stops working, even if he uses a high-powered flashlight to illuminate his eyes, his pupils will not change much.
If the condition is serious, the pupils will become larger unconsciously. If the pupil is dilated to the limit, it means that this person has no vital signs.