It is absolutely impossible to focus your eyes for 30 seconds and to not blink. I don't know anyone who can hold their eyes open and focus on some images for half a minute at a time!
I was officially diagnosed with Trigeminal Neuralgia by a neurologist, but I already knew I had TN the day after I experienced my worst symptoms. My first point of call was my dentist, as my pain seemed to be coming from my mouth, and within an hour of me seeing him, he said he was very sure I had neuralgia and to make a GP appointment ASAP. When I told my GP what my dentist had said, she sent a referral through for a neurology appointment. Sometimes your dentist really does know best.
I'm aware that everyone's circumstances are different and all scans will be different, but I've complied a small list of top tips to maybe give anyone a bit of help preparing for a brain MRI..