Polarized contact lenses?

I've been reading here quite a bit lately, and thought some of you
would
have something to say about this.
With all the advancements in contact lenses, especially the recent
""nike sport tint"" stuff, I think it would be possible
to create a polarized filter on contact lenses.

Basically, you'd need a toric lens with the toric weighting, but +0.0
cylinder (unless, of course, it's needed for correction). I suppose
there's some difficulty that would be involved in actually applying the
filtration: you'd either need to apply some kind of coating, or
somehow figure out how to align things when the lenses are cast..

It seems that polarized lenses are good for cutting down on glare, and
might be comfortable enough for all-around use..

Anyone think this would be a good idea?

In article <(E-Mail Removed) .com>,
(E-Mail Removed) wrote:

> I've been reading here quite a bit lately, and thought some of you
> would
> have something to say about this.
> With all the advancements in contact lenses, especially the recent
> ""nike sport tint"" stuff, I think it would be possible
> to create a polarized filter on contact lenses.
>
> Basically, you'd need a toric lens with the toric weighting, but +0.0
> cylinder (unless, of course, it's needed for correction). I suppose
> there's some difficulty that would be involved in actually applying the
> filtration: you'd either need to apply some kind of coating, or
> somehow figure out how to align things when the lenses are cast..
>
> It seems that polarized lenses are good for cutting down on glare, and
> might be comfortable enough for all-around use..
>
> Anyone think this would be a good idea?

A nice idea but not at all practical to do. Nearly impossible, actually
as you would need to fuse a polarizing layer to the existing lens and
then, as you mentioned, stabilize the rotation.

A much better and easily accomplished solution is to wear polarized
sunglasses over regular contact lenses.

FYI, we do have tinted lenses in any shade or density and even
photochromic RGP lenses that get darker outside and clearer inside.

LB, O.D.

LarryDoc wrote:
> In article
> <(E-Mail Removed) .com>,
> (E-Mail Removed) wrote:
>
>> I've been reading here quite a bit lately, and thought
>> some of you would
>> have something to say about this.
>> With all the advancements in contact lenses, especially
>> the recent ""nike sport tint"" stuff, I think it would
>> be possible
>> to create a polarized filter on contact lenses.
>>
>> Basically, you'd need a toric lens with the toric
>> weighting, but +0.0 cylinder (unless, of course, it's
>> needed for correction). I suppose there's some
>> difficulty that would be involved in actually applying
>> the filtration: you'd either need to apply some kind of
>> coating, or somehow figure out how to align things when
>> the lenses are cast..
>>
>> It seems that polarized lenses are good for cutting down
>> on glare, and might be comfortable enough for all-around
>> use..
>>
>> Anyone think this would be a good idea?
>
> A nice idea but not at all practical to do. Nearly
> impossible, actually as you would need to fuse a
> polarizing layer to the existing lens and then, as you
> mentioned, stabilize the rotation.

Ummm, just how thick does a polarizing layer need to
be to work?

-Quick

LarryDoc wrote:

>
> FYI, we do have tinted lenses in any shade or density and even
> photochromic RGP lenses that get darker outside and clearer inside.
>
> LB, O.D.

Whoa. Is this widely available, or only in specific applications? In
other words, what are the odds of a lens like I currently have being
available in "transitions"?

Do they look weird/creepy when dark?

--

On 7/3/06 11:29 AM, in article
Amdqg.79642$(E-Mail Removed), "Quick"
<quick7135-(E-Mail Removed)> wrote:

> Ummm, just how thick does a polarizing layer need to
> be to work?

Polaroid film is much thinner than the sandwich used to protect the flimsy
film. Technically, what is needed is a birefringent (preferably uniaxial)
material that is highly absorbing along one crystal axis but clear in the
other. Tourmaline is such a material. Other materials might be something
like the needle like crystals of some dyes. The original work by Land used
such crystals. See: http://en.wikipedia.org/wiki/Polaroid. Dyes tend to have
very strong absorption so that little thickness is required.

Bill
-- Ferme le Bush