Oasys??

#12 12-30-2005, 08:28 PM

Don't you think that silicon hydrogels are permeable enough to allow for
that drainage system to work with them on?

What about implantable contacts, that are never taken out?

<doctor_my_eye[at]msn.com> wrote in message
news:1135803027.232263.309620[at]g44g2000cwa.googlegroups.com...
- quote -

> Dr. Stacy is right on here, as he usually is

When you get away from
> that "longer-is-better" mindset that is the reason why Wendy's sells
> triple cheeseburgers, you realize that going for 7 day extended wear
> approval is in the patient's best interest. I remind our learned
> colleagues that the cornea is avascular tissue, and it needs to dump
> its waste products into the tear layer to have them wash away into the
> lacrimal drainage system.
> If you had one pair of underwear to wear continuously, would you feel
> better about 7 day wearers or 30? I equate 30 days of continuous wear
> with holding a glass of urine against your skin.
> William Stacy wrote:
> > MS wrote:
> > > Anyone have any idea why they were approved for 7 days, vs. the 30
days of
> > > other silicon hydrogel lenses such as N&D and Purevision?
> > > > > I think it was a J&J decision, based at least partly on the fact that
> > they seem to need more frequent (and maybe more thorough) cleaning.
> > They seem to be a bit lipophilic. I don't think it is an O2 issue.
> > > w.stacy, o.d.

#11 12-28-2005, 07:50 PM

Dr. Stacy is right on here, as he usually is

When you get away from
that "longer-is-better" mindset that is the reason why Wendy's sells
triple cheeseburgers, you realize that going for 7 day extended wear
approval is in the patient's best interest. I remind our learned
colleagues that the cornea is avascular tissue, and it needs to dump
its waste products into the tear layer to have them wash away into the
lacrimal drainage system.

If you had one pair of underwear to wear continuously, would you feel
better about 7 day wearers or 30? I equate 30 days of continuous wear
with holding a glass of urine against your skin.

William Stacy wrote:
- quote -

> MS wrote:
> > Anyone have any idea why they were approved for 7 days, vs. the 30 days of
> > other silicon hydrogel lenses such as N&D and Purevision?
> > I think it was a J&J decision, based at least partly on the fact that
> they seem to need more frequent (and maybe more thorough) cleaning.
> They seem to be a bit lipophilic. I don't think it is an O2 issue.
> w.stacy, o.d.

#10 12-26-2005, 10:06 PM

MS wrote:
- quote -

> Anyone have any idea why they were approved for 7 days, vs. the 30 days of
> other silicon hydrogel lenses such as N&D and Purevision?

I think it was a J&J decision, based at least partly on the fact that
they seem to need more frequent (and maybe more thorough) cleaning.
They seem to be a bit lipophilic. I don't think it is an O2 issue.

w.stacy, o.d.

#9 12-26-2005, 09:57 PM

Anyone have any idea why they were approved for 7 days, vs. the 30 days of
other silicon hydrogel lenses such as N&D and Purevision?

Is it that the FDA only found them suitable for 7 days, or did J&J only
apply for 7 days approval, not try for 30?

Are the lenses actually less suitable for longer term EW than the others, or
was it a marketing decision? (They would sell 4 times less lenses if people
changed them at 30 days rather than a week, although then I assume the price
per lens would be higher, so I don't know what the actual result for their
profits would be.)

Anyone have any ideas on this?

"keith" <keith.bagley[at]ca.com> wrote in message
news:1135352395.153953.247260[at]z14g2000cwz.googlegroups.com...
- quote -

> MS wrote:
> > I could go back and look for the posts to that effect, but I'm pretty
sure I
> > read that here.
> > > Could anyone explain this more? Is there an application to be approved
for
> > 30 day wear? If so, and it is not yet approved, any idea when it
actually
> > will be?
> Oasys was recently approved (in the US by the FDA) for 1 week
> continuous wear.
http://www.prnewswire.com/cgi-bin/st...4238169&EDATE=
> I believe the lenses were already approved for 1 week wear in the UK
> and other countries.
> Keith

#8 12-23-2005, 06:08 PM

True. We have just had a distributor of menicon open. I have my new set
of Z-CRT lenses (first one worked a treat yesterday, -2.00 shift on the
first night) and they have the full range of Menicon product available.

dr grant

#7 12-23-2005, 06:06 PM

No-one in the world has had an EW lens prior to SiH lenses (with the
exception of RGP materials).

The fact that the FDA approved lenses for overnight wear did not make
them EW lenses. The oxygen transmission was always too low. We had
0.035mm centre thickness lenses such as B&L O series, but they were
never a true EW lens. Americans can kid themselves that they were safe
due to FDA approval, but we never got on the bandwagon as our top
researchers, such as Brien Holden, Nathan Efron, Noel Brennan and their
colleagues always confirmed there was not enough oxygen, which has been
shown to be correct down the track.

dr grant

#6 12-23-2005, 02:39 PM

MS wrote:

- quote -

> I could go back and look for the posts to that effect, but I'm pretty sure I
> read that here.
> Could anyone explain this more? Is there an application to be approved for
> 30 day wear? If so, and it is not yet approved, any idea when it actually
> will be?

Oasys was recently approved (in the US by the FDA) for 1 week
continuous wear.
http://www.prnewswire.com/cgi-bin/st...4238169&EDATE=

I believe the lenses were already approved for 1 week wear in the UK
and other countries.

Keith

#5 12-02-2005, 05:31 PM

<stevekstevek[at]gmail.com> wrote in message
news:1132770566.815454.319500[at]g43g2000cwa.googlegroups.com...
- quote -

> MS: The rumors I've read (probably here) is that Vistakon was trying
> to get approval for 1 week EW, not 30 day wear. I think they're
> approved in the UK (and perhaps other countries) for 1 week EW, just
> like Acuvue.

That's not what I recall reading on this board. I read that they had applied
for 30 day wear status in the USA (and that they have a DK similar to 30 day
silicon hydrogels, such as Purevision or N&D), and were expected to receive
FDA approval for 30 day wear in November 2005.

I could go back and look for the posts to that effect, but I'm pretty sure I
read that here.

Could anyone explain this more? Is there an application to be approved for
30 day wear? If so, and it is not yet approved, any idea when it actually
will be?

How does the dK of Oasys (and other factors that affect EW) compare with
that of Purevision and N&D?

Have they been approved for EW in other countries yet?

Are some prescribing them (off-label) for 30 days EW now anyhow, despite not
yet having been approved for that purpose?

Thank you.

#4 11-24-2005, 12:29 AM

"LarryDoc" <larrybic[at]yahoo.remove.com> wrote

- quote -

> But on another note: I hear that you folks have or are getting the
> Menicon Menifocal RGP lens. True?

You have me confused with someone who fits GPs...

-MT

#3 11-23-2005, 11:29 PM

In article <aV5hf.4688$wf.3905[at]newsread3.news.atl.earthlink.net> ,
"Mike Tyner" <mtyner[at]mindspring.com> wrote:

- quote -

> "CatmanX" <grantm[at]connexus.net.au> wrote
> > Acuvue were never an EW lens here. Not remotely close to the oxygen
> > supply needed.
> So the Aussies never had an EW lens before silicone hydrogels?
> -MT

Must be the ozone hole thing. Or perhaps there just not enough oxygen
down there ;-)

But on another note: I hear that you folks have or are getting the
Menicon Menifocal RGP lens. True?

--LB, O.D.

Similar Threads
Thread	Forum	Replies	Last Post
Acuvue Advance and Oasys stevek: I had worn contacts (Acuvue/AV2) for about 5 years, pretty happily. About 3 years ago, when I went in for a checkup and refit, my OD told me that I...	Vision	7	09-10-2005 04:24 AM
Acuvue Oasys - patent problems? y_p_w: Nobody responded the first time around. Will the Acuvue Oasys go on sale in the US? Apparently Ciba is claiming patent infringement and asked for...	Vision	3	08-02-2005 02:47 PM
Acuvue Oasys - soon? keith: Does anyone have any news on the Acuvue Oasys lense - timeframe on when it will be available in the U.S.? Already available in Europe, I've heard...	Vision	45	07-25-2005 03:15 AM

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode