Your health is more important than the scan is. If you think this might be damaging your eyes, stop and get it checked out until you are comfortable. I was given dire predictions regarding how quickly my vision would deteriorate after my kidneys failed, the most pessimistic being that I would be blind within two years. That turned out to be completely wrong, but we didn't find out until after I'd panicked and made a bunch of poor decisions. Take your time and get things sorted out first, then worry about hobbies.