A lot of movies, especially horror movies (I’m watching one now) depict blind people as not having pupils. But my understanding, based on blind people I’ve met, is that the problem is usually in the lens or the retina, and that they have pupils the same as everyone else. Are there actually blind people out there whose eyes are 100% white, or is that purely a Hollywood invention?
Typically that depiction is due to extreme corneal edema (swelling of the front surface of your eye, which is a clear structure). As it swells (edema) it becomes opaque (white). This happens when you die (hence the creepiness) but also in some corneal diseases such as Fuchs Corneal Dystrophy