It is bad to be in a cold climate and perform something that has to do with heat. Your skin is not yet used to it yet. The heart, because it is pumping all the time. Maybe a car accident might have effected their brain. The reflection might appear in diffent places.
Some people have longer or shorter eyeballs, causing the reflection appear in wrong places.
The pupil is an empty space. It just lets light come into the eye. The rods and cones combine their images when there is light. The rods can only see in black. The sclera, the tough and white slippery part of your eye.