Scuba contact lenses

I'm looking for glasses or contactlenses for use when scuba diving.
Is this possible? Does anybody know where to find more info on this
subject...

It would be nice to dive without the mask
I know about a tribe of sea gipsy called "chao ley" they have learnt to
see better below water as kids.


--
Tor
www.gjerrestad.no

I were glasses. When in scubadiving, i usually were contact lenses. Normal
ones. They work ok if you remember you are wearing them.
Other option is to graduate with lenses your diving mask. If you lose your
lenses before or during your dive, you may replace the mask and continue the
dive.
Ric

"Tor" <tor@gjerrestad.no> wrote in message
news:oprxn33qdvi0ca9r@news.chello.no...
> I'm looking for glasses or contactlenses for use when scuba diving.
> Is this possible? Does anybody know where to find more info on this
> subject...
>
> It would be nice to dive without the mask
> I know about a tribe of sea gipsy called "chao ley" they have learnt to
> see better below water as kids.
>
>
> --
> Tor
> www.gjerrestad.no

I don't want the mask at all..
I want to use lenses to see clearly without the mask.
Tor

På Sun, 26 Oct 2003 21:33:02 -0000, skrev Ricardo
<ricardogermano@netcabo.pt>:

> I were glasses. When in scubadiving, i usually were contact lenses.
> Normal
> ones. They work ok if you remember you are wearing them.
> Other option is to graduate with lenses your diving mask. If you lose
> your
> lenses before or during your dive, you may replace the mask and continue
> the
> dive.
> Ric
>
> "Tor" <tor@gjerrestad.no> wrote in message
> news:oprxn33qdvi0ca9r@news.chello.no...
>> I'm looking for glasses or contactlenses for use when scuba diving.
>> Is this possible? Does anybody know where to find more info on this
>> subject...
>>
>> It would be nice to dive without the mask
>> I know about a tribe of sea gipsy called "chao ley" they have learnt to
>> see better below water as kids.
>>
>>
>> -- Tor
>> www.gjerrestad.no
>
>



--
Tor
www.gjerrestad.no

"Tor" <tor@gjerrestad.no> wrote in message
news:oprxocikaei0ca9r@news.chello.no...
> I don't want the mask at all..
> I want to use lenses to see clearly without the mask.
> Tor

Given the human eye is designed to work in a medium with the refractive
index of air suddenly putting it in water is going to cause problems - its
why underwater is blurry.
I should imagine contact lenses would be impossible as would glasses purely
due to the small size you'd need and the distance involved.

Tor wrote:
> I don't want the mask at all..
> I want to use lenses to see clearly without the mask.

During the basic scuba course, you instructor should have explained
that this is rather impossible. You need the air-gap in order to focus.
And you need that airgap connected with your nose, otherwise when you
go down, the pressure would push your eyes into your head. Not a pretty
thought.

I have a Mares Seta mask with a set of lenses (-4.5 and -5.5), and a
set of spare lenses in case one breaks. Works fine. The only real
problem is on the boat/shore between the time I take my glasses off and
put the mask on.

/Marcin

"Marcin Dobrucki" <Marcin.Dobrucki@FAKE.nokia.com> wrote in message
news:4wbnb.1244$k4.28338@news1.nokia.com...
> Tor wrote:
> > I don't want the mask at all..
> > I want to use lenses to see clearly without the mask.
>
> During the basic scuba course, you instructor should have explained
> that this is rather impossible. You need the air-gap in order to focus.
> And you need that airgap connected with your nose, otherwise when you
> go down, the pressure would push your eyes into your head. Not a pretty
> thought.
You need correction and I suppose a set of rigid contacts could be designed
to do that.
Assuming that was true the major problem would be keeping them in. Surface
tension is used and that does not work well under water.
They might also have to be a bit thick making blinking a bit of a problem.
The closer a mask is to your face the wider the vision but the closer the
sides are, the narrower the vision. These lenses might be like looking
through two tubes.

> > I don't want the mask at all..
> > I want to use lenses to see clearly without the mask.

> During the basic scuba course, you instructor should have explained
> that this is rather impossible. You need the air-gap in order to focus.
> And you need that airgap connected with your nose, otherwise when you
> go down, the pressure would push your eyes into your head. Not a pretty
> thought.

I don't need an air gap to focus, only to focus clearly. While it may not be
possible to do so, I will need to be convinced that a contact lens can not
be constructed to compensate for the difference. Keeping such a lens in
place, however, might be a serious problem.

With contacts, there is probably no unfilled air gap between the eye and the
lens. As a result, there's no eye squeeze involved as there surely is with
goggles and other devices that provide an air gap but do not allow for
equalization.

Lee

"Marcin Dobrucki" <Marcin.Dobrucki@FAKE.nokia.com> wrote in message
news:4wbnb.1244$k4.28338@news1.nokia.com...
<snip>
> And you need that airgap connected with your nose, otherwise when you
> go down, the pressure would push your eyes into your head. Not a pretty
> thought.

My instructor never covered that. It seems to me that when you equalize the
mask (to keep your sinuses from having issues), you increase the pressure
inside the mask to the same as the pressure outside the mask. If your
eyeballs were going to get pushed into your head, htey should do it
regardless of if the pressure is coming from the air or the water (I'd
think).

C Guynn

På Mon, 27 Oct 2003 16:14:56 GMT, skrev Marcin Dobrucki
<Marcin.Dobrucki@FAKE.nokia.com>:

> Tor wrote:
>> I don't want the mask at all..
>> I want to use lenses to see clearly without the mask.
>
> During the basic scuba course, you instructor should have explained
> that this is rather impossible. You need the air-gap in order to focus.
> And you need that airgap connected with your nose, otherwise when you
> go down, the pressure would push your eyes into your head. Not a pretty
> thought.
> /Marcin
>

Bullshit Marcin... Be serious..


--
Tor
www.gjerrestad.no

"Chris Guynn" <chrisguynn@sbcglobal.N.O.S.P.A.M.net> wrote in message
news:tMenb.102$cf3.78@newssvr22.news.prodigy.com.. .
>
> "Marcin Dobrucki" <Marcin.Dobrucki@FAKE.nokia.com> wrote in message
> news:4wbnb.1244$k4.28338@news1.nokia.com...
> <snip>
> > And you need that airgap connected with your nose, otherwise when you
> > go down, the pressure would push your eyes into your head. Not a pretty
> > thought.
>
> My instructor never covered that. It seems to me that when you equalize
the
> mask (to keep your sinuses from having issues), you increase the pressure
> inside the mask to the same as the pressure outside the mask. If your
> eyeballs were going to get pushed into your head, htey should do it
> regardless of if the pressure is coming from the air or the water (I'd
> think).

It's good that he or she didn't. If you don't equalize the lower pressure in
the mask will try to "suck" your eyes out of your head, not push them in.
The pressure on our hypothetical contacts would be the same as that on the
eyes and would not push the eyes in.