Tired eyes after extended use of Focus Night and Day Contact Lenses

I tried using the Focus N & Ds for 2 days continuous wear and my eyes got
extremely tired after that. My eyes did not get noticeably redder but just
got extremely tired and uncomfortable. I had to remove the lenses. My eyes
have since recovered after a night's rest. What could be the cause of the
fatigue as I don't experience this when wearing glasses?

Andrew Chew wrote:
>
> I tried using the Focus N & Ds for 2 days continuous wear and my eyes got
> extremely tired after that. My eyes did not get noticeably redder but just
> got extremely tired and uncomfortable. I had to remove the lenses. My eyes
> have since recovered after a night's rest. What could be the cause of the
> fatigue as I don't experience this when wearing glasses?

Just a layman's (I work evenings and weekends!) guess: perhaps the
prescription isn't correct yet?

--
Cheers,
Bev
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ =+=
"The object in life is not to be on the side of the
majority, but to be insane in such a useful way that
they can't commit you." -- Mark Edwards

"Mike Tyner" <(E-Mail Removed)> wrote in message
newsBq3e.13009$(E-Mail Removed) link.net...
>
> "Andrew Chew" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed) t...
>>I tried using the Focus N & Ds for 2 days continuous wear and my eyes got
>>extremely tired after that. My eyes did not get noticeably redder but just
>>got extremely tired and uncomfortable. I had to remove the lenses. My eyes
>>have since recovered after a night's rest. What could be the cause of the
>>fatigue as I don't experience this when wearing glasses?
>
> There are a half-dozen possible reasons and it's pretty tough to know
> which of them apply to you without seeing the lenses on your eye.
>
> -Movement on blink, too loose or too snug, pooling, tear circulation
>
> -Affinity and interreaction between the lens material and each
> individual's proteins/lipids/mucins
>
> -Edge design and contour interaction, modulus, standoff
>
> -Surface tension and wettability of the lens
>
> Ciba's designs are usually very comfortable but some people never get
> comfortable with FND. Acuvue's 8.3 silicon hydrogel is establishing a
> better track record for comfort. It isn't approved for overnight yet.
> PureVision will be available again in 2-3 weeks, I hope.
>
> As a rule, the material doesn't matter as much as the fit. It's possible
> some silicone hydrogels might be inherently less comfortable. It isn't
> likely Ciba designed an uncomfortable lens.
>
> -MT

The optometrist who attended to me checked the fit when I put on the lenses
and she said it was very good. I guess it could be one of the other reasons
you listed then.

"The Real Bev" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Andrew Chew wrote:
>>
>> I tried using the Focus N & Ds for 2 days continuous wear and my eyes got
>> extremely tired after that. My eyes did not get noticeably redder but
>> just
>> got extremely tired and uncomfortable. I had to remove the lenses. My
>> eyes
>> have since recovered after a night's rest. What could be the cause of the
>> fatigue as I don't experience this when wearing glasses?
>
> Just a layman's (I work evenings and weekends!) guess: perhaps the
> prescription isn't correct yet?

I am very sure the prescription is right on when I'm wearing glasses. The
optometrist checked it with the red/green backgrounds. I have heard if one's
prescription exceeds -4, a formula is applied to adjust for the curvature of
the lens or something, so people end up using contacts of a lower
prescription. However my prescription is -2.25 and -3.00 so that doesn't
apply.

"Mike Tyner" <(E-Mail Removed)> wrote in message
news:zGq3e.13014$(E-Mail Removed) link.net...
>
> "The Real Bev" <(E-Mail Removed)> wrote
>
>> Just a layman's (I work evenings and weekends!) guess: perhaps the
>> prescription isn't correct yet?
>
> Duh.. yeah, Bev has a real point.
>
> I mentioned modulus and standoff. These influence the optics. -425 in one
> material might act as -475 with another.

But wouldn't the lens manufacturer have graded them according to their true
refraction?

It's difficult for me to understand why you have to succumb to such a
nightmare?

What the ods are saying?

You suffer from a disease, and the medicine is worst than the malady!!!

What kind of world have we created?

AND YOU STILL CONTINUE TO TRUST THESE PEOPLE???

Please wake up!

Andrew Chew wrote:
> I tried using the Focus N & Ds for 2 days continuous wear and my eyes
got
> extremely tired after that. My eyes did not get noticeably redder but
just
> got extremely tired and uncomfortable. I had to remove the lenses. My
eyes
> have since recovered after a night's rest. What could be the cause of
the
> fatigue as I don't experience this when wearing glasses?

Had you been wearing another brand of lenses prior?

DrG

"Dr. Leukoma" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
>
> Andrew Chew wrote:
>> I tried using the Focus N & Ds for 2 days continuous wear and my eyes
> got
>> extremely tired after that. My eyes did not get noticeably redder but
> just
>> got extremely tired and uncomfortable. I had to remove the lenses. My
> eyes
>> have since recovered after a night's rest. What could be the cause of
> the
>> fatigue as I don't experience this when wearing glasses?
>
> Had you been wearing another brand of lenses prior?
>
> DrG
>

I have tried 1-day Acuvues but actually find the FNDs more comfortable due
to the higher oxygen permeability.

My two cents: I've found that when fitting N&D and lenses of that
modulus, it is critical to over-refract to determine final lens power at
any power level, and especially for powers over +/- 4D. Further, when a
patient is changing from a low DK material or improperly fit (or worn!)
lens, as the cornea heals/de-swells over the first week or so, the
refraction changes and the power needs to be adjusted.

And, as MT said, the resulting acuity difference between lenses and even
between eyes is not necessarily going to be the same. Sometimes when I
fit patients, I trial a number of different lenses in each eye. I hope
that the most comfortable one provides the best vision, but that is not
always the case.

---------

BTW, just stopped by for my monthly check to see what's going on over
here at sci.med.vision. I "see" that the same BS is "happening", with
75-80% of the traffic having to do with the "dynamic trio" of Otis,
Rishi and AndrewJ. I've kill filed all of them and threads with related
subjects and it's remarkable that a few "appropriate" posts get through,
but even half of them are still "related" to those "pointless points."
(I do so enjoy the pointless quotes!) So I'll go away again and check
back next month. Best wishes to all of you who are still here and
dealing with real issues from real people.

--LB, O.D.

LarryDoc wrote:
> My two cents: I've found that when fitting N&D and lenses of that
> modulus, it is critical to over-refract to determine final lens power
at
> any power level, and especially for powers over +/- 4D. Further,
when a
> patient is changing from a low DK material or improperly fit (or
worn!)
> lens, as the cornea heals/de-swells over the first week or so, the
> refraction changes and the power needs to be adjusted.
>
> And, as MT said, the resulting acuity difference between lenses and
even
> between eyes is not necessarily going to be the same. Sometimes when
I
> fit patients, I trial a number of different lenses in each eye. I
hope
> that the most comfortable one provides the best vision, but that is
not
> always the case.
>
> ---------
>
> BTW, just stopped by for my monthly check to see what's going on over

> here at sci.med.vision. I "see" that the same BS is "happening",
with
> 75-80% of the traffic having to do with the "dynamic trio" of Otis,
> Rishi and AndrewJ. I've kill filed all of them and threads with
related
> subjects and it's remarkable that a few "appropriate" posts get
through,
> but even half of them are still "related" to those "pointless
points."
> (I do so enjoy the pointless quotes!) So I'll go away again and
check
> back next month. Best wishes to all of you who are still here and
> dealing with real issues from real people.
>
> --LB, O.D.

Thanks for stopping by, Larry. Actually, most of deal with "real"
issues from "real" people everday. For some of use, sci.med.vision is
akin to relaxation, and at times, entertainment. Pick and choose.

DrG