Hi, Cardiff university, school of optometry have a database of research participants and you can apply to be on it. They cover all aspects of optometry including neuro-optometry. They also have a clinic for NHS and private patients, whether they cover the neuro aspect in that clinic I'm not sure.
You may have been told or heard that optometry methods are some kind of bogus or pseudo science in the treatment of visual problems relating to brain injury, from personal experience I can assure you it is not. The school of optometry is part of the school of medical sciences at Cardiff and it is based on real science. This type of treatment is relatively new in the UK, however it has been used in the US for at least 2 decades with astonishing results.