What would u be looking for on an orbits and brain mri?

MRI: This would be a very long answer as an mr is used for many diagnostic reasons ranging from a bleed, a traumatic injury, a tumor among a number of other issues.

Too many reasons: It really depends on the reason it was ordered. If you had a visual field defect, it could be looking for an area of stroke. But other reasons include looking for multiple sclerosis, looking for swelling around the nerve, looking for arterio-venous malformations and fistulas. You should speak with the doctor who ordered it.

Anything abnormal: All scans are compared with what the structures look like when normal. If something is abnormal, therefore different than normal, the job of the radiologist is to identify it and determine as best as possible what it is. The same goes for orbits (containing eyes, eye muscles, etc.) and brain scans looking for things different than normal.