Rattling along underground in a vicious humour, all around me are temporarily like me; none can see the blue of the sky. The tube disgorges beneath Kings-Cross and we all barrel out, the stick-wavers, the 20-20s and me. There’s probably some of my kin around too, but we never make eye contact, head for the city. There’s a city in all of our eyes, great towers of rhodopsin raising up, the rods and the cones, an empty city that collapses at the touch of light. In my city the architect’s plans went awry, or he lacked imagination and my city looks all samey, not enough variety in those towering discs. As in the eye, so in the world and my world, outside the vitreous humour (if it’s really there) also has lost something from that failure; colour.