Mark,
I can guarantee you that if your glasses are that old that its the
anti-reflective coating coming off. All of these coatings are
designed to last the life of a prescription. Your prescription from
the eye doctor is only good for 1 to 2 years and then you should have
a regular eye exam within this time period...this is what is
recommended by all eye doctors. Therefore these coatings will only
last that long. Anti-reflective coatings are multi-layered coatings
that thru time the outer coatings "wear" off thru cleaning and such.
Alcohol and ammonia based cleaners will "speed" up the wearing off of
such coatings. Even with using the specially designed lens cleaners
these coatings are not going to last as long as your expecting them
too. Now, I carry in my store a solution that removes the anti-
reflective coating. If you can find someone there where you live
that carries that solution you can have them remove it for you. The
best coatings on the market now carry at the most a two year warranty
and a couple of them are really good coatings too. Hoya Hi-Vision
and Hoya Super Hi-Vision are good coatings and carry two year
warranties....I've had good success with them. Another is called
Crizal. I like the Hoya coatings the best..they have better scratch
resistance qualities in my opinion. They are available in different
plastic materials so you have several options.
Hope this helps and let me know if you have any other questions.
Brent

--- In opticallabs@yahoogroups.com, "mrstringer" <mrstringer@y...>
wrote:
>
> Brent,
> Thanks for your reply. I kind of suspected that the coatings on my
> lenses are responsible for the loss of optic quality. When I fist
> got my lenses 5 years ago they were super clear. They have an
> anti glare as well as UV coating, sort of a green shimmer. Now,
> after 5 years the optics are much worse.
>
> I'm dissapointed that they only maintained their opitc quality for
4
> or 5 years. Is this standard for coatings? The guy who sold them
> to me assured me that the lenses and coatings were state of the
> art.
>
> I would like to try glass lenses but I think my perscription is to
> severe, 1.45 or something like that. I'll look into it, and also
those
> coatings you mentioned.
>
> I had some insurance recently that entitled me to a pair of
> eyeglasses. I got some plastic lenes with no coatings on them.
> They are crystal clear compared to my 5 year old lenses. I'll see
> how they last.
>
> Thanks again for the info.
>
> Mark
>
>
>
>
>
> --- In opticallabs@yahoogroups.com, waylonfannm
> <no_reply@y...> wrote:
> >
> > Mark,
> > Lenses don't wear out however certain coatings can slowly
> distengrate
> > and compromise the optics. Also, scratches play a part in the
> acuity
> > of lenses. Glass lenses surpass all lenses as far as the best
> optics
> > that you can get however there is a weight issue there. Your
> > prescription will determine if you need a thinner lighter
> > material...there a quite a few on the market to choose
> from...much of
> > it depending on how much correction you have. There is a
> newer lense
> > made from a material called Trivex which has exceptional
> optics and
> > is a very durable lense. This lense with an anti-reflective
> coating
> > should give you exceptional optics. Anti-reflective coatings
> improve
> > the light transmission of the lenses therefore improving clarity
> > also. Two coatings on the market that are very good are the:
> Hoya
> > Super Hi-vision anti-reflective coating and also the Crizal Azize
> is
> > good also.
> > Hope this helps,
> > Brent Seilheimer, A.B.O.C
> >
> > --- In opticallabs@yahoogroups.com, "mrstringer"
> <mrstringer@y...>
> > wrote:
> > >
> > > Hello,
> > >
> > > I'm nearsighted and have been wearing glasses for 25 years
> or
> > > so. I've noticed that whenever I get new glasses the new
> lenses
> > > seem to work much better, clearer and sharper, even though
> > > they have the same perscription. Do lens "wear out" over
> time?
> > > Does it has something to do with the lens coatings that are
> > > popular these days? What are the best lenses to buy? I'm
> > > interesested in maximum clarity, I'm thinking of going with
> just a
> > > plain lens, no anti glare coatings or such.
> > >
> > > thanks,
> > > Mark