I just bought one, which frankly took me totally by surprise.
My brother is just now starting scuba classes and ran across it in a web search somehow. Forwarded the link to me. I read it - with a BIG grain of salt - and emailed him back I'd be worried about polycarbonate scratching, pooling in the domes, the high volume, I just plain don't usually trust purge valves, etc. etc.
But the damn idea just 'et at me. I checked some reviews here (many threads complain of leaks, poor skirt fit, etc etc) and in the end went by Scubatoys to see one in person. A very helpful gent suggested I go to their pool in the back of the store and feel free to dunk my head in the water. I did, and it knocked my socks off. Someon above said the only 'advantage' they saw from it was that it got rid of distortions, so pool stripes etc were actually straight...I can't see how that is such a 'tiny' little thing...the difference, to a near-sighted diver, is extraordinary.
Spent a bit more time in the pool at home today comparing it to my pre-existing mask (bog standard flat low to mid vol with prescription lenses). By the way, yes, I do fall right into that category of blindness that's a perfect 'naked eye' match to the mask; my prescription is -4.0 in one eye, and -3.5 with another -1 astigmatism in the other (so by their math that eye is -3.5 + (1/2 * -1.0) = -4.0 as well). I am pushing 40 but my near-vision accomodation is great - no doubt caused by too many hours glued to a computer screen with eety beety text (I like high resolutions).
With my standard mask, my back to one 'long' side of the pool and facing the other, the mask frame and the water's refraction clearly limited my vision to about 1/2 the opposite pool's edge. Plus the magnification effect made it seem much closer than it should have been. I've noted the mag effect a lot when diving; got into the (bad for streamlining) habit of trailing a hand downward when cruising over coral etc. because I always think I'm much, much closer to the bottom than I really am, and with a hand trailing down I've got a better reference to compare with and know I'm still sufficiently clear I won't touch or damage the reef. But I do find I have to keep glancing straight down to 'check' and inevitably any water in my mask planes over the flat lenses and causes significant distortion. The only advantage of the magnification effect is that I'm always the one to find the little jawfish and blennies, since I'm diving with a built-in microscope essentially
With the HO 4.5DD on, same position, I could see the entire opposite side face of the pool, end to end. I had to 'strain' to turn my eyes far enough (without turning my head) to see the sides of the mask. The lack of distortion and magnification effect make my hands, etc. all look normal, rather than making me think I'm looking at the world thru a Sherlock Holmes handheld glass... I did experiment with swimming and looking down, sometimes with intentionally some water in the mask. If anything for me the 'pooling' effect was LESS irritating than having water sheet across the whole flat face of the mask when looking down - my eyes just went around the edges of the 'puddle'.
I have yet to try it out in 'real diving' to find out how bad it will be to clear, to keep from getting a squeeze on descents, etc, but so far I'm extremely impressed and would say it was well worth the money, should it pass those tests satisfactorily. I'm not even too worried about the purges - heck, if I find I really can't trust them at all, I'll silicon caulk the SOBs shut....
Oh and the really funny part, to me: my brother, who found it in the first place, went to his eye doctor to doublecheck his prescription and found out he's PLUS 1.0 to 1.5ish (farsighted, not nearsighted). So the mask would be totally inappropriate for him without extreme contact correction (do they even make -5 contacts???).
I'll try to report back once I get some real open-water experience with it!
My brother is just now starting scuba classes and ran across it in a web search somehow. Forwarded the link to me. I read it - with a BIG grain of salt - and emailed him back I'd be worried about polycarbonate scratching, pooling in the domes, the high volume, I just plain don't usually trust purge valves, etc. etc.
But the damn idea just 'et at me. I checked some reviews here (many threads complain of leaks, poor skirt fit, etc etc) and in the end went by Scubatoys to see one in person. A very helpful gent suggested I go to their pool in the back of the store and feel free to dunk my head in the water. I did, and it knocked my socks off. Someon above said the only 'advantage' they saw from it was that it got rid of distortions, so pool stripes etc were actually straight...I can't see how that is such a 'tiny' little thing...the difference, to a near-sighted diver, is extraordinary.
Spent a bit more time in the pool at home today comparing it to my pre-existing mask (bog standard flat low to mid vol with prescription lenses). By the way, yes, I do fall right into that category of blindness that's a perfect 'naked eye' match to the mask; my prescription is -4.0 in one eye, and -3.5 with another -1 astigmatism in the other (so by their math that eye is -3.5 + (1/2 * -1.0) = -4.0 as well). I am pushing 40 but my near-vision accomodation is great - no doubt caused by too many hours glued to a computer screen with eety beety text (I like high resolutions).
With my standard mask, my back to one 'long' side of the pool and facing the other, the mask frame and the water's refraction clearly limited my vision to about 1/2 the opposite pool's edge. Plus the magnification effect made it seem much closer than it should have been. I've noted the mag effect a lot when diving; got into the (bad for streamlining) habit of trailing a hand downward when cruising over coral etc. because I always think I'm much, much closer to the bottom than I really am, and with a hand trailing down I've got a better reference to compare with and know I'm still sufficiently clear I won't touch or damage the reef. But I do find I have to keep glancing straight down to 'check' and inevitably any water in my mask planes over the flat lenses and causes significant distortion. The only advantage of the magnification effect is that I'm always the one to find the little jawfish and blennies, since I'm diving with a built-in microscope essentially
With the HO 4.5DD on, same position, I could see the entire opposite side face of the pool, end to end. I had to 'strain' to turn my eyes far enough (without turning my head) to see the sides of the mask. The lack of distortion and magnification effect make my hands, etc. all look normal, rather than making me think I'm looking at the world thru a Sherlock Holmes handheld glass... I did experiment with swimming and looking down, sometimes with intentionally some water in the mask. If anything for me the 'pooling' effect was LESS irritating than having water sheet across the whole flat face of the mask when looking down - my eyes just went around the edges of the 'puddle'.
I have yet to try it out in 'real diving' to find out how bad it will be to clear, to keep from getting a squeeze on descents, etc, but so far I'm extremely impressed and would say it was well worth the money, should it pass those tests satisfactorily. I'm not even too worried about the purges - heck, if I find I really can't trust them at all, I'll silicon caulk the SOBs shut....
Oh and the really funny part, to me: my brother, who found it in the first place, went to his eye doctor to doublecheck his prescription and found out he's PLUS 1.0 to 1.5ish (farsighted, not nearsighted). So the mask would be totally inappropriate for him without extreme contact correction (do they even make -5 contacts???).
I'll try to report back once I get some real open-water experience with it!