I hope your neuro visit went well. My neuro also ordered an MRI, EEG and a myriad of blood tests. I also had an eye exam to eliminate Wilson's Disease. I'm a bit claustrophobic, so opted for an open-sided MRI. It's pretty much like it sounds - open on the sides so one doesn't feel as closed-in. I don't know how readily available open-sided MRI machines are. I've also heard they are less accurate, but adequate for use in a Parkinson's diagnosis.
I later was in a study that required a functional MRI and had to be in a 'regular' MRI machine. They covered my eyes with a wash cloth, which helped. The wash cloth was placed so I could still peek out and look 'down' toward my feet, but not up toward the machine which is in your face. As you mention, you can also get a prescription for something that takes the edge off.
Best of luck!
Life is a dance. Don't sit it out. --- H. Jackson Brown