Don't worry Dave, I've had a detached retina and cataracts. Cataracts are a stroll in the park. They can numb it with drops and they make the tiniest cut in the eye.
Detached retina is a bit more tricky as they inject the eye to numb it and after the op you have to sit and sleep upright for two weeks! Had mine done during the last World Cup. Thank goodness there was nothing to get out of my seat for!