It was a BOSH job mate.

His back eye is blurry in real life from when he was run over by a helicopter being flown by a yodelling monk called percy. By mistake (what are the chances!!) the monk had let daphne, his small and yet multi talented goldfish, have a go at the controls...well the daft glubber bounced it down premo style and nailed poor old Martin to the turf damaging his eye... The irony !!!