Conventional swimming goggles just don't do it for me, given the way they seem to suck your very eyeballs out of their sockets. When I saw these Aqua Sphere Seals I was a little sceptical on how much bigger they would be. Well I can tell you it's a bit like wearing a very lightweight skiing goggle rather than a swimming google. As a result, peripheral vision is excellent, and the softly contoured mask seals very well around the upper cheeks, temples, nose, and forehead. A slight press onto the face is all you need to effect the seal, and thereafter they stay watertight and very comfortable. No more bulging eyes ... bliss.