Ah, I’m a Brit, I’ve been going through this with the NHS and while the eye clinic did mention the cross linking and possible transplant. They were very much of the opinion that it was a measure of last resort and would only consider it if my eyes got drastically worse.
Brit here, but we put any style of onion on and in anything, raw onion, fried onion, pickled onion, caramelized onion or onion chutney, take your pick.