How is pupil dilate suddenly to return a responsibility

summary

In our life, there are many times when some people's pupils will enlarge, but they don't know what the reason is. The most common and common is that when we look at what we like, our pupils will also enlarge unconsciously. But this is because we see what we like, but why do our pupils dilate for no reason? This needs a scientific explanation to answer. So how is pupil dilation? If a man sees his favorite girl, his heart will definitely beat faster, accompanied by pupil dilation. Let's talk about it.

How is pupil dilate suddenly to return a responsibility

First of all: some brain diseases can also cause mydriasis. Pupil reflection to light will disappear, cornea will disappear and some other situations, this is when people are stimulated by the outside world and produce a kind of excitement, the pupil will expand. In daily life, people are most exposed to the detection of vision, using atropine and other drugs to diffuse the pupil.

Secondly: mydriasis, in addition to some pathological factors, is sometimes an instinctive protective reaction of the body. Sometimes, it can guess a person's psychological activities through the changes of the pupil. Under normal circumstances, the pupil is a contractible hole in the iris of the eye. Whether it expands or shrinks, it is round. Pupil can not only respond to light and shade, it can adjust the light entering the eye, but also affect the depth of focus and spherical aberration of the eye optical system.

Finally: the pupil can adjust its size according to the light intensity of the outside world. When the light is strong, the pupil will become very small, and when the light is weak, the pupil will become larger, which is the self-protection of the pupil to the eyes. Doctors regard the pupil as a sensitive indicator of life function.

matters needing attention

Some comatose patients will be aggravated with the degree of loss of consciousness. At this time, the pupils will gradually dilate. When the pupil dilates completely, it is the sign of the end of life. The size of the pupil, will reflect some psychological activities, whenever there is a strong interest or the pursuit of motivation, the pupil will quickly expand.