Eye prob while driving

Every so often while driving on motorways I get a weird sensation that can cause me to pull over as my sight is affected and I feel as though I could be a danger to others.  Generally it happens on a straight section that is fairly fast moving and not too busy, the fast moving white lines and crash barriers seem to put me into an almost hypnotic trance feeling and I start to feel as though I am in a 1980's computer game and that I am sitting still and everything is rushing towards me, the only way to describe it is that it's like being in spaceraiders where the stars (while dots on a realy old screen) are buzzing towards you. Often I can sense it's going to happen and by looking around I can stop it, but if not I lose sense of speed, I am in 100% control of the car though.  Weirdly it happens less when I'm driving alone, i think because I'm more nervous with a passenger  

I am 33 years old who and I have Hyperprolactinaemia which is controlled with Carbogoline, I know my levels are normal (was checked 2 months ago) but I have not had an MRI for 2 years so have to assume there is not associated tumour.

I have mentioned it to my optician, but she looked at me as though I was mad and didn't understand, so I'd like to know if anyone out there has had something similar and can offer advise

THanks

[John C Hagan III, MD, FACS, FAAO]

See an Eye MD ophthalmologist for a baseline exam. If it gets worse see a neuroophthalmologist

JCH MD