Brianseye.com exists - about macular degeneration.
Domain names are a pain in general. Every time you think of a decent one, some other bugger has registered it already - either that or it's the name of a company or it resembles a trademark and is off-limits. There's an author called Innes Brian, for example.
Rather than trying to build one out of your name, you could base it on your subject matter: e.g. beyondthemist.co.uk doesn't exist.