When Dan Thomas travels on foot he likes to build a map of the route in his mind. It includes more details than most pedestrians would need like the position of post boxes, electrical cabinets, flower pots, and lamp posts. But for Dan detail is everything.
Dan, 36, is registered as blind. He's not completely blind, though, and still has light perception – so if, for example, you put your hand in front of his face then he would know it's there. "But [my light perception] is not functional in any way these days. It used to be – it’s deteriorated as I’ve gotten older," he says.
"I used to be able to see colours… I used to be able to see what colour you were wearing, maybe what colour your hair was, and stuff like that. If there were cars around I could see the colours of the cars. That’s all gone these days."
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