jwfollette
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I have astigmatism so standard corrective lenses won't work and I also need bifocals. Anyone have recommendations about who does the best job, best mask, etc.?
prescription lenses for mask
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jeffsterinsf
Contributor
I have a Rx that is about -3 -1@90deg or so. I use a Look mask (Technisub and apparently AquaLung in the US) with -3.50 spherical correction. It is a reasonable option for me. I believe that DiveInn has these masks and lenses at a reasonable price.
Have not looked into ground lenses as the correction is "good enough" for me. YMMV if you have more astigmatism than I do.
Have not looked into ground lenses as the correction is "good enough" for me. YMMV if you have more astigmatism than I do.
ERP
Guest
I just priced prescription lenses for my Apollo Prestige mask at my LDS.
Off the shelf corrective lenses were $40 a piece available in 0.5 increments.
Custom Ground lenses for my astygmatic right eye were $80 a piece.
I seriously considered this until I realised that I would be unable to see if I removed the mask (duh!), so I'd need to leave my mask on all the time in the water, and I would have to carry a spare mask with prescription lenses just incase a strap broke and I lost the mask in the water. In the end I decided that using contacts was just a lot less hassle.
Off the shelf corrective lenses were $40 a piece available in 0.5 increments.
Custom Ground lenses for my astygmatic right eye were $80 a piece.
I seriously considered this until I realised that I would be unable to see if I removed the mask (duh!), so I'd need to leave my mask on all the time in the water, and I would have to carry a spare mask with prescription lenses just incase a strap broke and I lost the mask in the water. In the end I decided that using contacts was just a lot less hassle.
BigDiversDaddy
Guest
I have had a history of eye problems,such as detached retinas, cataracts, and the start of glaucoma,and because of surgeries I can no longer wear a contact in my right eye. I tryed diving with just a standard mask ,but of coarse I was not seeing nearly as much as there was to see. I ended up buying a Seavision with corrective lenses as well as bifocals. I also found out that my insurance was willing to pay for the lenses and the installation into the mask, I ended up only paying for just the standard mask. This is without a doubt my best piece of equipment.
rickyd
Contributor
There is a formula your optometrist can give you that averages the astigmatic correction with the myopia to determine a new perscription . That's what I did, and I see great.
I "think" the formula is your perscription + 1/2 the astimatism correction; the angle is not used.
So, in my case, for my right eye I am a -5, with a -2.5 astig. So the adjusted perscription is -5 plus -1.25 = -6.25. (adjusted up to -6.5) Similar for the left eye, but it comes out to -5. Ordered standard lens
There's a term for this formula that escapes me, but its something like "the circle of least confusion". Ask your Doc.
BTW, when dry, I wear progresive bi-focals, so, as my near vision worsens over time, I will probably have to go to a ground lens for my mask, or maybe try the stick on bi-focal sheets. I've heard they're OK. So far, I can still read my gauges ;-)
I "think" the formula is your perscription + 1/2 the astimatism correction; the angle is not used.
So, in my case, for my right eye I am a -5, with a -2.5 astig. So the adjusted perscription is -5 plus -1.25 = -6.25. (adjusted up to -6.5) Similar for the left eye, but it comes out to -5. Ordered standard lens
There's a term for this formula that escapes me, but its something like "the circle of least confusion". Ask your Doc.
BTW, when dry, I wear progresive bi-focals, so, as my near vision worsens over time, I will probably have to go to a ground lens for my mask, or maybe try the stick on bi-focal sheets. I've heard they're OK. So far, I can still read my gauges ;-)
and need Verilux progressive lenses for my presbiopia (Gee, I sound pitiful!) and I've been using Sea Vision masks with their ground RX lenses for years.
I just give them my RX, they make my mask and send it to my dive shop. It's pricey but I can see just as well u/w as I do above.
I just give them my RX, they make my mask and send it to my dive shop. It's pricey but I can see just as well u/w as I do above.
jeffsterinsf
Contributor
This is what I was told as well by my optometrist.
Newhampster
Contributor
Not a personal question, just curiosity. Are there medical reasons for "needing" progressive lenses instead of going with bifocals? Or is it an image thing? (no pun intended)
Newhampster
Contributor
I have a lot of astigmatism (as well as other eye problems) and if the angle of the cylinder is off by 5 degrees, I can get an eyestrain headache very, very quickly.
Without the angle (cylinder angle) spec'd, I can't imagine how they can grind a lens for an astigmat.
scubaturek
Guest
I'm myopic, with a fair amount of astigmatism. I also use progressive bifocals on the surface. What I have now is SeaVision lenses, with a Rx that was "dialed back" by my optodoc because of the mag factor of the water. I use the stick-on bifocal thingies.
I also have toric-ground contacts, and have used them with a regular mask. But these depend on gravity for correct orientation, so when I look down, they "float", rotating out of alignment. I then need to look up to re-orient. Plus, need the bifocal thing to read my gauges.
Gonna talk to the doc again soon, and get a new Rx for bifocal lenses from SeaVision (I'm using USD Hawaii II primary and backup masks).
Joe
I also have toric-ground contacts, and have used them with a regular mask. But these depend on gravity for correct orientation, so when I look down, they "float", rotating out of alignment. I then need to look up to re-orient. Plus, need the bifocal thing to read my gauges.
Gonna talk to the doc again soon, and get a new Rx for bifocal lenses from SeaVision (I'm using USD Hawaii II primary and backup masks).
Joe
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