Hey Rainbow,
I have to agree with what has been said by Pogo. I cannot see signs of hydrocephalus from those images, but can clearly see a shift in brain anatomy. You state you have a CD of the images, does the CD also contain the radiologists report. You need that report
Vision changes is something that is often a sign of something neurological occurring BUT sight is a complex sense. Many years ago it used to be thought that specific areas of the brain controlled certain parts of the body. Now it has been established that parts of the brain interact with each other to form and process sight and not an individual process of a single area.
Dizziness is another sign of something neurological is occurring and this too can be linked to a loss of balance and nausea. Personally I'd say that without the radiologists report, some dr's could simply label it as possibly 'hormonal changes' and I am not saying this as a sexist comment, but a statement of fact. My issues, for many years were put down as hormonal changes (as a teen) prior to MRI and CT scans being readily available.
It was more than 20yrs later that I had a scan and it was only after my dr's had received the radiologist report that immediate action was taken.

Best of luck with it all and please do keep us informed. I would be more than interested to know.
Merl1n