Changing eye color by lessening the amount of melanin in eyes and not by surgery

My friend, who has naturally dark brown eyes, wants to change her eye color. She doesn't want to get surgery. She's considering using eye drops that with regular use lessen the amount of melanin in eyes and permanently change their color. She has to keep using the drops for the color to remain. If she stops using the drops, the dark brown color returns. **Question:** As women are lightening the melanin in their skin and hair and that's not considered wrong, if my friend does the same to her eyes, would this be wrong?