Hi my son has also got Keratoconus which they have said is not related to the GPA vasculitis. He needs to have an operation on his eyes but had to cancel this as he had just started the methotrexate and steroids 2 weeks before and they didn't feel things were stable enough. Does anyone know much about having an operation whilst on the treatment and would he have to be completely off the drugs before they could do colllegen cross linking on his eyes? ENT specialist said he thought maybe it was due to the steroids and they would interfere with the healing process. The problem is his eyes are deteriorating and I don't think there are plans for him to come off the drugs any time soon. Any thoughts? Thank you.