Heaps of people in the past have asked about eye colour changing spells. Here's my say on the matter;
1. No spell will physically change your eyecolour for however long you want that colour to be ther.
2. I think it's an illusion created to make you and those before you think your eye colour has changed.
3. Your eye colour is there to stay. If you want to use a spell to create an illusion, bear in mind that it isn't real, and the illusion will not last long.
Thant's all i wanna say, let me know what you think about the whole eye colour changing idea.