In article <1140205805.777129.150930[at]o13g2000cwo.googlegroups.com> ,
acemanvx[at]yahoo.com wrote:

- quote -

No thanks. Not my job. I certainly won't try to tell an OD how to do
their job.

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I'm no OD, but I can't imagine giving you a pescription for contacts,
either.



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I wouldn't recommend surgury, either.

--
Dan Abel
dabel[at]sonic.net
Petaluma, California, USA

Schein's team calls contact lenses "very safe" in general, though they
note that contact lenses are associated with some extra risks, compared
with eyeglasses.

They rank the risk of vision loss from eye infection for different
types of contact lenses:

Lowest risk: Rigid, gas-permeable contact lenses for daily wear
Next-to-lowest risk: Soft contact lenses for daily wear
Highest risk: Silicone hydrogel contact lenses for extended wear of
three-to-four weeks

-------------------------------------------------------------
extended-wear hydrogel: NSK, 48.2 and SK, 96.4; and
daily-wear hydrogel (excluding daily disposable): NSK, 14.1 and SK,
6.4;
------------------ extended-wear silicone hydrogel: NSK, 98.8 and SK, 19.8.
daily-wear silicone hydrogel: NSK, 55.9 and SK, 0.0;


You can see that silicone is much safer. If we compare hydrogel vs.
hydrogel we see that sleeping in them increases the risks of severe
keratitis by about 15 times. The problem is you guys are comparing
silicone vs. hydrogel. Thats apples to oranges. I already understand
that silicone is safer, period. What im trying to show is sleeping in
silicone is infiniately riskier than daily wear. Notice that the rate
for severe keratitis is ZERO by NOT sleeping in those silicone lenses!


Wearing contact lenses overnight can increase the risk of keratitis
compared with using lenses only during the day. For extended-wear
users, silicone hydrogel lenses offer less risk of keratitis compared
with hydrogel lenses. The risks however are much higher compared for
daily wear.


The rate for severe keratitis when sleeping in hydrogel lenses was 96
per 10,000 wearers per year compared to 20 per 10,000 per year for
wearers of silicone hydrogel lenses. These compare to 6.4 wearers per
year for daily wear of hydrogel lenses and almost 0 wearers per year
for daily wear of silicone hydrogel lenses.


"Individuals tend to make choices based on factors such as comfort,
convenience, personal preference, and safety," notes Schein. "The data
are solid that the risks are least with rigid and soft daily-wear
contact lenses, more with overnight wear of contact lenses and most
with refractive surgery," he adds."


I leave this up to the individual. My choice is sticking to glasses and
occasional daily wear of contacts. I will never sleep in contacts! Some
people are risk takers and gamble their eyes and vision by sleeping in
contacts and especially getting RS, namely lasik. I never understood
why gamble your eyes sleeping in contacts? It takes me and most people
less than a minute to remove one's contacts and put them in the holder
before going to bed. It takes only a minute to pour out the old
solution, rinse the contacts in new solution, fill the contacts with
solution and insert them in the eyes. Its as easy as brushing your
teeth! Do you really want to risk your eyes more than neccessary to
save a minute of your time? I sure as heck dont! My eyes are far more
important than the very, very slight convinence and time saving of
inserting/removing contacts. I wear glasses most of the time so I avoid
the risks of contacts alltogether!

I invite both of you to talk to my optometrist. Last year I
specifically went to get a pescription for "focus day and night"
contacts. My optometrist gasped and said "oh no!" I wouldnt even think
of it, its dangerous! I have patients come in all the time with
infections and pathalogies. Yes this optometrist was talking about
focus day and night being dangerous and this is a new, advanced silcone
hydrogel. He said dont sleep in any contacts, period.


Its my optometrist's word against yours. You can say whatever you want
vs. whatever my optometrist says. I researched the risks of overnight
contacts on the net and my optometrist was right. One ophthamologist
even said overnight contacts is as risky as laser surgury over the long
term!

Ace, like Otis, thrives on the attention of people whose knowledge
exceeds his own. Just ignore him.

DrG

this posting highlights a specific problem with you ace. you know just
enough information to be dangerous! you surf the web and find
documents that are outdated and you take them as gospel.

this document is old-- before the release of silicone hydrogel lenses.
some silicone hydrogel lenses are indeed approved by the FDA for 30 day
extended wear. they allow sufficient oxygen to supply the cornea so no
oxygen deficiency occurs. the rate of infection with extended wear
silicone hydrogels is only slightly higher than conventional daily
wear, not 10-15 fold.

the poster who started this thread is wearing a brand of silicone
hydrogel lenses. your posting is incorrect and invalid. this is but
another example of your foolishness.

be gone ace. go to otis' forum. or get a job, quit spending daddy's
money, and try your hand at getting a real life.

The FDA approved extended wear lenses to be worn for up to 30 days
without removal. But researchers later found the incidence of eye
infections was greater among people who sleep in their contact lenses.
The FDA changed the maximum extended wear period to seven days, but
many eyecare practitioners decided that any overnight wear at all is
too risky.

The concern is that potentially dangerous organisms, which might enter
your eye from your fingers, your eyelids, or the lens care solutions
you use, might get lodged under your lens. These organisms can thrive
better if your contact lens is not removed nightly, and if the oxygen
supply to your eye is reduced because a lens is covering it. This might
cause infections that range from an annoying case of conjunctivitis to
more serious conditions that can lead to blindness.





The most serious safety concern with any contact lens is related to
overnight use. Extended-wear (overnight) contact lenses--rigid or
soft--increase the risk of corneal ulcers, infection-caused eruptions
on the cornea that can lead to blindness. Symptoms include vision
changes, eye redness, eye discomfort or pain, and excessive tearing.

The risk of corneal ulcers for people who keep extended-wear lenses in
overnight is 10 to 15 times greater than for those who use daily-wear
lenses only while awake, says James Saviola, O.D., chief of the
vitreoretinal and extraocular devices branch at FDA's Center for
Devices and Radiological Health.

When the eyes are open, he explains, tears carry adequate oxygen to the
cornea to keep it healthy. But during sleep, the eye produces fewer
tears, causing the cornea to swell. Under the binding down of a rigid
contact lens during sleep, the flow of tears and oxygen to the cornea
is further reduced. This lack of oxygen leaves the eye vulnerable to
infection.

Extended-wear rigid lenses also can cause unexpected, sometimes
undesirable, reshaping of the cornea.

Soft extended-wear lenses also bind down on the closed eye, but they
are porous and allow some tears through during sleep. Because they have
so little form, their binding has little effect on the shape of the
eye.

FDA has approved extended-wear lenses for use up to seven days before
removal for cleaning. Still, there are risks with use of extended-wear
lenses, "even if it's just one night," Saviola says. Daily-wear lenses
are removed daily for cleaning and are a safer choice, provided they
aren't worn during sleep.



My optometrist knows all that. I am ashamed of any optometrist who is
so blantly misguided about the risks of extended overnight contact
wear! Just because its FDA approved does NOT make it safe! LASIK has
been "FDA approved" but many thousands of people ruin their eyes from
laser surgury! If you are too lazy to take 30 seconds to pop out your
contacts before you go to bed, you dont deserve to wear contacts! Stick
to glassses!

The FDA approved extended wear lenses to be worn for up to 30 days
without removal. But researchers later found the incidence of eye
infections was greater among people who sleep in their contact lenses.
The FDA changed the maximum extended wear period to seven days, but
many eyecare practitioners decided that any overnight wear at all is
too risky.

The concern is that potentially dangerous organisms, which might enter
your eye from your fingers, your eyelids, or the lens care solutions
you use, might get lodged under your lens. These organisms can thrive
better if your contact lens is not removed nightly, and if the oxygen
supply to your eye is reduced because a lens is covering it. This might
cause infections that range from an annoying case of conjunctivitis to
more serious conditions that can lead to blindness.





The most serious safety concern with any contact lens is related to
overnight use. Extended-wear (overnight) contact lenses--rigid or
soft--increase the risk of corneal ulcers, infection-caused eruptions
on the cornea that can lead to blindness. Symptoms include vision
changes, eye redness, eye discomfort or pain, and excessive tearing.

The risk of corneal ulcers for people who keep extended-wear lenses in
overnight is 10 to 15 times greater than for those who use daily-wear
lenses only while awake, says James Saviola, O.D., chief of the
vitreoretinal and extraocular devices branch at FDA's Center for
Devices and Radiological Health.

When the eyes are open, he explains, tears carry adequate oxygen to the
cornea to keep it healthy. But during sleep, the eye produces fewer
tears, causing the cornea to swell. Under the binding down of a rigid
contact lens during sleep, the flow of tears and oxygen to the cornea
is further reduced. This lack of oxygen leaves the eye vulnerable to
infection.

Extended-wear rigid lenses also can cause unexpected, sometimes
undesirable, reshaping of the cornea.

Soft extended-wear lenses also bind down on the closed eye, but they
are porous and allow some tears through during sleep. Because they have
so little form, their binding has little effect on the shape of the
eye.

FDA has approved extended-wear lenses for use up to seven days before
removal for cleaning. Still, there are risks with use of extended-wear
lenses, "even if it's just one night," Saviola says. Daily-wear lenses
are removed daily for cleaning and are a safer choice, provided they
aren't worn during sleep.



My optometrist knows all that. I am ashamed of any optometrist who is
so blantly misguided about the risks of extended overnight contact
wear! Just because its FDA approved does NOT make it safe! LASIK has
been "FDA approved" but many thousands of people ruin their eyes from
laser surgury! If you are too lazy to take 30 seconds to pop out your
contacts before you go to bed, you dont deserve to wear contacts! Stick
to glassses!

In article <1140089672.613112.184530[at]g44g2000cwa.googlegroups.com> ,
"CatmanX" <drgrant[at]ozemail.com.au> wrote:

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So, who are you calling a dickhead?

I'm sure that several of us will send you instructions on how to
"quote". Just ask.

--
Dan Abel
dabel[at]sonic.net
Petaluma, California, USA

Patient abuse is the chief cause of people having problems with
contacts.

Regarding "no such thing as safe overnight contacts."...have you and
your O.D. do some homework on SiH (Silicone Hydrogel) lenses...The
brands that are out there, that advertise continuos wear for up to 30
days, aren't just saying it, the FDA has approved it. They all have
super high DK/t ratings which relates to Oxygen transmission. The
mimimum DK/t for safe daily wear has been established to be 24, most
all of the SiH lenses have DK/t well over 100, some approaching 200.
Keep in mind high DK/t doesn't always = a good, comfortable contact
lens. The biggest challenge with SiH lenses right now is patient
comfort. The material they are made of is stiffer, seems to attract
deposits more quickly and in general will have some mechanical issues,
as far as eyes go.

acemanvx[at]yahoo.com wrote:

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Please cite your sources for that belief.

DrG