As they say, everything is possible in our world! Well, there are several ways, temporary and permanent:
Temporary - you need to drop drops on the pupil that dilate the pupils.
Permanent - you just need to get brain damage, for example, a strong blow to the head.
Don't be silly.
And then just the text is nothing to gain stosorok this character answering this question, taaaaaaaaaaaaaaaaaaaaak a little more and had almost everything, there is still a little bit
It is difficult to answer whether it is possible only by desire, to make the pupil widen or narrow when looking at a person. That is to say, to manage it fully, as for example by hand. I wanted to narrow, I wanted to expand. Most likely it is oooo very difficult, tk. have to fight the reaction of the body.
The pupil is a hole. Indeed, it is like the diaragm of a camera, but the pupil itself regulates how much light must be passed in order for the image to be clear.
Surgically, you can fix everything, but most often you cannot do without harm to health.
There is also a genetic abnormality when the pupil is deformed from birth - cat's eye syndrome.