You can change your eye color - but only when you are all by yourself in front of a mirror for a couple minutes.
Everyone just thinks you put in some colored contacts.
"No, man, I can change my eye color, but I gotta be alone with a mirror..."
"Bro, you are just putting in some colored contacts. I don't know why you carry this shit with you and hide them somewhere and act like you can actually just will y our eye color to be different, but just stop. This is a really stupid party trick. I'd rather look at Travis' third nipple again than wait for you to come out with your shitty blue contacts for the second time."