poor eye sight and diving masks when using a camera

Depending on your prescription, Nauticam's adjustable viewfinder (in conjunction with any adjustment on the camera) may help match the viewfinder to your long-sightedness. I think that it can be adapted to other housings.

I started wearing specs for reading but now need them for long-distance vision too, so now wear varifocals. However, visibility under water being what it is in even the best conditions, I find I don't need to see details far away so I go for the one prescription (plus 3 diopres) for the whole lens. Peter scoones, underwater cameraman, told me he has a lens for close-up in one side of his mask anda lens for distance in the other and his brain sorts it out.