Warning Welders, Cutters and MRI's

Just wanted to pass on a (possible) danger to anyone who is a fabricator and may be getting an MRI in the future. I went to the Doc yesterday for hip and back problems and he wanted to schedule a MRI, but one stipulation or question was if I had done any cutting, welding or grinding. It seems that in these activities there may be metal fragments get into your orbital sockets and the danger with a MRI is eye damage including optic nerve damage. To mitigate this they have scheduled orbital x-rays prior to the MRI. I haven't heard of this possible danger and do not know of the veracity of it but wanted to pass on the information.