Why do hyperopes have constricted pupils and dilated myopes?

They don't. At least not as far as I have seen. Hyperopes tend to have narrower anterior chamber angles and are at higher risk for angle closure glaucoma. Perhaps that is what you are noticing. You can dilate or constrict your pupils by either ... read more

This is why the pupils are constricted and often you might get"crossed eyes" in people who are trying to focus. Of course, the vast majority of hyperopes aren't that high so this is not a common problem. read more

It is commonly reported that the pupils of women are larger than those of men and the pupils of myopes larger than those of emmetropes. However, these reports are not supported by experimental procedures using objective measurements, controlled conditions, and adequate numbers of subjects. read more