My mom has been scheduled for undergoing cornea transplant for her right eye amd now says she doesn’t want to go ahead as she doesn’t know if that donor whose cornea tissues taken will be momin or not. And wants to cancel transplant. Can you please clarify this? If she can go ahead with transplant or not ? Is it haram to do so?

Even if that person is not a believer, she can still get the transplant. Once the cornea becomes part of her eyes, it becomes fully pure. Please tell her to proceed with the transplant and not cancel it.