Intristin', that.
There are some basic procedures for which the NHS have a long waiting list and they tie up lots of resource for basically in-and-out ops. So... there are courses to train opthalmic opticians to do teh procedures, adapt their premises, get a nurse on board and turn these around. He already has state of the art retinal scanning kit and software, and has saved a good few eyesights where GPs and geriatric visitors have missed pressure build up from diabetes, and early onset galucoma cases. Unfortunately, the NHS is not fronting for the training.