My eyes change color occasionally. Explain that one! No; I don't wear contact lenses.
1. Build up of heme in the bloodstream;
2. need for blood dialysis;
3. you're from Kentucky, named "Harris" and have blue skin (which is real ~ and treatable).
My husband's eyes are normally brown. Several time when he has gotten ill (auto immune) they turn a lovely green.
But I'm relieved when they return to brown. :-)