There's blind (as, for example, Helen Keller) and then there's "legally" blind. Even if someone is 100 percent medically blind (not just legally blind), firearms have value and are personal property, and the police cannot (at least in theory) deprive people of their property without due process.
Good call by the judge.
As to "legally blind," I have read articles in some of the "gun" rags about legally blind people who compete in practical shooting competitions. I've even read of people who are completely blind who shoot recreationally with the assistance of a spotter.