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Garrobo
January 16th, 2007, 04:10 PM
Can anyone recommend a reasonably-priced prescription mask? Not the little dinky ones about an inch across which you place on the inside of the glass but the full glass prescription type. I know that I am missing out on stuff since I wear bi-focals.

Doc Intrepid
January 16th, 2007, 04:13 PM
http://www.seavisionusa.com/masks.asp

I use one of these...

they're pretty sweet...

The Kraken
January 16th, 2007, 05:12 PM
I back Doc on this 100%.
My whole family dives SeaVision masks.

the K

Diver Dennis
January 16th, 2007, 05:17 PM
Mares X-Vision with drop in lenses. I sacrifice a little on the short distances since I don't need glasses to read. I might just check out Doc's link though...

mislav
January 16th, 2007, 05:31 PM
TUSA Splendive IV (http://www.simplyscuba.com/ProductDetails.aspx?StockID=6374) - that's what I use. I have -6 lenses on both eyes. The mask is great.

Jim Baldwin
January 16th, 2007, 10:04 PM
Can anyone recommend a reasonably-priced prescription mask? Not the little dinky ones about an inch across which you place on the inside of the glass but the full glass prescription type. I know that I am missing out on stuff since I wear bi-focals.

Tusa Liberator with drop in lenses.

RoyN
January 18th, 2007, 12:47 PM
What the Doc said, have 2 seavision mask and probably would never go to other mask at all.

CompuDude
January 19th, 2007, 03:22 PM
www.prescriptiondivemasks.com

SharkDiver36
January 19th, 2007, 03:32 PM
Seavison is by far the best. Extremely comfortable masks with options on the mask from colored lenses, bifocal, purges, etc.. Well worth the money.

Allison Finch
January 19th, 2007, 08:42 PM
I have a seavision and a mask from Prescriptiondivemasks. The seavision has small guage readers that are not adequate for doing my photography.
Prescriptiondivemasks will let you design how and where the bifocals go. Mine are a full "half mask" design. I love it!! I hardly ever use the Seavision anymore. It was a little less than 100.00 which sounds expensive, but it makes all my dives so much better that it was more than worth it.

WOODMAN
January 21st, 2007, 12:55 PM
Whichever you choose, I recommend that you make sure that the mask fits you well first, and then have the optical lenses fitted to it. Be sure you talk to the optical house who will do the prescription lenses before you buy the mask, as not all masks have enough clearance inside for the lenses. And if you use bifocals, make sure you have the placement of the bifocal line correctly marked. I have a mask where the line is just a little too high, and I was constantly fighting with it to keep the bifocal out of my general vision plane.:shakehead

Spikester54
January 27th, 2007, 07:29 PM
I am considering this mask for my perscription. Couple of questions:
Is the entire lens made for my perscription, or do they add an insert to the lens?
I noticed on the companies web page you can get color correcting lenses as well. Do you use these, and if so, what are the advantages and disadvantages. Thanks for your help.

shakeybrainsurgeon
January 27th, 2007, 08:10 PM
The seavision I use is excellent...the whole lens is made to your prescription, no "drop ins"...they are expensive (about 200 dollars for a typical mask) but worth it.

Hyper-limits
January 27th, 2007, 08:49 PM
Here

http://www.diveriteexpress.com/fins/masklenses.shtml

$129.00 not bad.

MichiganDiver
January 27th, 2007, 09:24 PM
You should consider the Hydrooptix mask (www.hydrooptix.com (http://www.hydrooptix.com/)). It has been discussed elsewhere on this board.

The mask is designed to use the optical properties of water as a natural lens. In fact, you need to be near-sighted to use it; 20-20 divers need to wear contacts to make themselves near-sighted.

It's a bit unconventional, in that it is not a "low-volume" mask (by a long shot), so you have to beware of "mask squeeze" as you descend.

I purchased one of these masks, and I can say that the field of view is excellent. I have not had the opportunity to dive more than once with it, but the one dive was fine. Prior to that I dove with contact lenses and fitted small bifocals inside my non-prescription mask. I found the bifocals to be quite distracting. The line made me feel like I was always swimming to an edge or cliff.

I will also say that a company executive called me twice after I expressed interest on their website. She was quite personable. We chatted for at least 30 minutes about the mask and diving in general. Her personal attention contributed to my decision to purchase the Hydooptix. I believe that I bought it from Leisure Pro -- the best price I could find at the time. Competitive with prescription masks.

fisherdvm
January 27th, 2007, 09:29 PM
The corona is a very reasonable priced prescription mask for an adult or child with a small face.

spectrum
January 27th, 2007, 11:03 PM
http://www.seavisionusa.com/masks.asp

I use one of these...

they're pretty sweet...

I contacted them to find a local dealer or to get a "loaner mask" to try before spending money on my script. My face is not an easy one to fit so trying in advance is just common sense. I was surprised that they had no way to work with me. All they could say is that they fit most faces.

I do like the product line especially the clip-on option. My home and travel waters can be very different.

Pete

ba_hiker
January 28th, 2007, 03:44 AM
I have had a couple of masks fitted to my perscription and was well satisfied by this guy, a skin diver in Ukiah. Scuba vision is his business.

http://www.zapcom.net/~scubavsn/zap_page/

Marek K
January 28th, 2007, 09:06 AM
Can anyone recommend a reasonably-priced prescription mask? Not the little dinky ones about an inch across which you place on the inside of the glass but the full glass prescription type. I know that I am missing out on stuff since I wear bi-focals.
Hi!

I assume: a) you're nearsighted; b) you're not diving with any kind of correction now; and c) you're wondering whether you need not only distant-vision correction, but near vision (bifocal "reading") correction also.

I'm about -9.5 diopters nearsighted in each eye, with about +2 progressive reading correction now in each eye... in my eyeglasses. I can't read comfortably in air at even arm's length without the reading correction. Plus I've got quite a lot of astigmatism.

But I dive with spherical (no reading or astigmatism correction) -9.0 corrective lenses in my dive mask. I have perfect distant vision in the water, and no problems at all seeing things close-up... like gauges. Optics in water are quite different than in air.

The point is that spherical-correction mask lenses are much cheaper than those with astigmatism and/or reading correction. If you don't need the additional correction in the water, you can save a lot of money.

Problem is, you can't know for sure until you try lenses.

Your mask may have off-the-shelf spherical-correction lenses available, which would be the cheapest thing to try -- and you might even be able to talk your dive shop into letting you return or exchange them if they don't work.

If you do have to go with custom-made lenses, either because of your mask or your correction, companies like SeaVision do a fine job.

--Marek

JonKranhouse
January 28th, 2007, 04:32 PM
Marek's claim that he has [paraphrasing] "perfect distance vision underwater despite quite a lot of astigmatism, due to underwater optics behaving differently in air” is not accurate if his astigmatism is over 1.0 diopter. To determine your "sphere-equivalent" Rx correction, take 1/2 have the value of your CYL correction and add that to your SPH correction. NOTE that some eye docs write CYL as a "+" value and others as a "-" value -- but the lens geometry is identical.
So you may be adding
a "+" SPH with 1/2 the "-" CYL
OR
a "+" SPH with 1/2 the "+" CYL
OR
a "-" SPH with 1/2 the "+" CYL
OR
a "-" SPH with 1/2 the "-" CYL

In air we do not read an eye chart through clouds of smoke, so we can easily judge the acuity of refraction-correction. But underwater, floating particles always degrade acuity. When Marek assumes his distance vision is "perfect," he likely would also report the visibility of the water to be less than can be seen through exact optical correction. The same lack of astigmatism correction likely aids his presbyopic (near) vision, where increased image size makes up for degraded acuity. There is only one true way to experience the actual “viz.” (http://www.hydrooptix.com/tv_100x_sharper.html)

Marek K
January 28th, 2007, 05:13 PM
Marek's claim that he has [paraphrasing] "perfect distance vision underwater despite quite a lot of astigmatism, due to underwater optics behaving differently in air” is not accurate...

Fair enough. I think I shouldn't have used the word "perfect."

Nevertheless, for whatever reason (like limited vision range underwater... even though I dive a lot in clear Red Sea waters), I find that I'm very satisfied with only the spherical correction I've got.

By the way, my corrected mask is far from perfect in the air... I definitely notice the lack of astigmatism correction. But it's good enough to navigate around on a dive boat until I get my glasses on.

My wife has a spare mask with -5.5 spherical correction lenses in it (she doesn't use it because it isn't very comfortable). In an emergency, I could use that mask and see decently underwater. That's something that would never happen with the same spherical lenses in air.

I do wonder how much the magnification factor in water affects how well I see.

I accept I could probably get better vision with astigmatism and presbyopia correction too... but I think the cost of such lenses would be too much for me. More than I'm willing to spend, in any case.

--Marek


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