Prescription Mask
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Marek K
Contributor
If you get to Florida, stop by a Diver's Direct. The Tusa Liberator mask fits a lot of faces and they have the snap-in lenses for about $20 each. You get to try before you buy, and if it doesn't work, just take it back to the store.
It worked for my wife.
It worked for my wife.
We used Leonard Maggiore (Prescription Dive Masks) for my wife's prescription. I can highly recommend him: He did a great job, extremely fast turnaround, and now my wife can actuall see things under the water. I think the charge was $250 including the return shipping. Her's was a bifocal that took up most of the inside of the mask lens. I think readers are less expensive.
Guy
Guy
Uh-huh. They really rip you off for bifocal lenses. I tried the little stick-ons but they were a waste of money. Luckily, I am able to read the things on my computer and SPG which are important to me without bifocals.
Marek K
Contributor
:ermm:
Now that's interesting. You mean through their Optical Lens Calculator?
Snorkel-Mart | Snorkel Gear | Snorkeling Equipment | Snorkeling Combos |
I'm sure you know that they're not really cranking in any actual astigmatism (cylinder) correction. All they're doing is adjusting the spherical correction up a bit to partially compensate for the astigmatism.
It works for relatively low amounts of astigmatism correction (playing around with the calculator, that's apparently -1.00 of cylinder). Anything above that, and they suggest you go "custom."
So that's what they say for my cylinder corrections of -1.75 and -2.75.
I say again, though, the corrective mask lenses I've got are just plain spherical -9.5 in each eye, which is one step weaker than the actual respective sphere corrections. I see perfectly underwater. I found that a mask correction at or just above my glasses correction causes eye strain for me underwater.
My challenge now may be that my reading correction is now up to +2.25 in each eye. I've never had a problem reading my gauges up to now, with I think +2.00 ADD, but we'll see how it is this year... Sucks getting old... :ermm:
Now that's interesting. You mean through their Optical Lens Calculator?
Snorkel-Mart | Snorkel Gear | Snorkeling Equipment | Snorkeling Combos |
I'm sure you know that they're not really cranking in any actual astigmatism (cylinder) correction. All they're doing is adjusting the spherical correction up a bit to partially compensate for the astigmatism.
It works for relatively low amounts of astigmatism correction (playing around with the calculator, that's apparently -1.00 of cylinder). Anything above that, and they suggest you go "custom."
So that's what they say for my cylinder corrections of -1.75 and -2.75.
I say again, though, the corrective mask lenses I've got are just plain spherical -9.5 in each eye, which is one step weaker than the actual respective sphere corrections. I see perfectly underwater. I found that a mask correction at or just above my glasses correction causes eye strain for me underwater.
My challenge now may be that my reading correction is now up to +2.25 in each eye. I've never had a problem reading my gauges up to now, with I think +2.00 ADD, but we'll see how it is this year... Sucks getting old... :ermm:
DiverHowie
Registered
Im an nearsited older diver who normally wears bifocals. I had DiveProDiveGear.com who sell DiveOptx give me invaluable assistance in getting my dive mask sorted to allow me to read my gauges and computer perfectly. With nearsighted divers their masks are fitted with lenses to adjust to correct their distance vision (negative diopters). This means that for a bifocal needing diver, the close-up vision through these lenses is WORSE than for just plain uncorrected glass mask lenses. So the DiveOptx lenses must recorrect the influence of the distance corrected lenses installed in the mask. How to calculate what you need? (In my case, like most bifocal wearers, I can comfortably read close up WITHOUT glasses) For someone like me, take your distance corrected value of the negative diopters (say -2.5) then REVERSE that figure (making +2.5) then subtract 1 (to compensate for the magnification power of water (leaving final value +1.5). You can test this rough rule of thumb by putting in a contact lens for your prescription and popping down to a local drug store and checking how close up reading of very small letters looks with the reading glass offerings they have on sale there. Remember, what looks perfect on the surface is too strong an adjustment under water ( the plus-one diopter effect). I found this works brilliantly for me, the tiny digits on my Suunto Stinger watch becoming brilliantly readable for the very first time, my distance vision through the upper part of the mask lens just right too!!!
diverhowie
i am far sighted with 2.0--2.5 corrction. i got my lenses from a place in illinois. they work fine i would bet they do the corrections to get the proper lenses. my linses are bonded to the mask. i dont have the address for them handy however the address is on the aeris website for the compumask.
i am far sighted with 2.0--2.5 corrction. i got my lenses from a place in illinois. they work fine i would bet they do the corrections to get the proper lenses. my linses are bonded to the mask. i dont have the address for them handy however the address is on the aeris website for the compumask.
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