Thank you for the replies everyone.

I have seen a neurologist, ophthalmologist and currently a neuro-ophthalmologist.

I will bring up that test with him, I’m not sure off the top of my head if it’s one I’ve already had. Not sure when I will see him. Last time was in October and he scheduled in a 6 month catch-up appointment but these appointments are rough guidance (he is in demand and more urgent cases get priority) so not heard anything yet.