Change in prescription due to contact lens?

It's only of academic use to me, but am curious to know what kind of dioptre
change in prescription is possible when the eye is tested the day after
contacts were last worn. Obviously the type of lens worn is a major factor.
Are there any studies/figures around for this?

TIA
Gary

Gary wrote:
> It's only of academic use to me, but am curious to know what kind of dioptre
> change in prescription is possible when the eye is tested the day after
> contacts were last worn. Obviously the type of lens worn is a major factor.
> Are there any studies/figures around for this?
>
> TIA
> Gary

The extreme example of this is in overnight orthokeratology, where a 2
to 3 diopter change is possible.

DrG

"Dr Judy" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) ups.com...

> With well fitting soft lenses, very little. Well fitting rigid gas
> perms may show up to 1D both in sphere and cyl.

Thanks. How about soft toric lenses? Still 'very little'?

Gary wrote:
> It's only of academic use to me, but am curious to know what kind of dioptre
> change in prescription is possible when the eye is tested the day after
> contacts were last worn. Obviously the type of lens worn is a major factor.
> Are there any studies/figures around for this?
>
> TIA
> Gary


soft contacts normally dont produce a change but ive heard focus day
and night contacts causing a mild orthoK effect if worn inside out. RGP
contacts often have a mild orthoK effect. When someone wants lasik, he
must be out of contacts for a while to remove all doubt and allow the
cornea to revert back.

On 30 Jun 2006 13:13:31 -0700, (E-Mail Removed) wrote:

>
>Gary wrote:
>> It's only of academic use to me, but am curious to know what kind of dioptre
>> change in prescription is possible when the eye is tested the day after
>> contacts were last worn. Obviously the type of lens worn is a major factor.
>> Are there any studies/figures around for this?
>>
>> TIA
>> Gary
>
>
>soft contacts normally dont produce a change but ive heard focus day
>and night contacts causing a mild orthoK effect if worn inside out. RGP
>contacts often have a mild orthoK effect. When someone wants lasik, he
>must be out of contacts for a while to remove all doubt and allow the
>cornea to revert back.

Ace,

On what do you base your statements above? Is it *primarily* your
clinical research, or is it from your first-hand experience in your
optometric practice?

Thanks.

I have -1 cylinder power in my left eye and I can see perfectly through
it in the morning after wearing RGP the previous day. Not sure how
long it would persist. My right eye is -1.5 cyl and it is still a
little off.

Dr Judy wrote:
>
> Gary wrote:
> > It's only of academic use to me, but am curious to know what kind
> > of dioptre change in prescription is possible when the eye is
> > tested the day after contacts were last worn. Obviously the type of
> > lens worn is a major factor. Are there any studies/figures around
> > for this?
> >
> > TIA
> > Gary
>
> With well fitting soft lenses, very little. Well fitting rigid gas
> perms may show up to 1D both in sphere and cyl.
>
> With ill fitting lenses and especially with rigid non gas perm, the
> sky's the limit. I remember back before GP where one might find 5D to
> 6D of variation.
>
> Dr Judy



--

Neil Brooks wrote:
> On 30 Jun 2006 13:13:31 -0700, (E-Mail Removed) wrote:
>
> >
> >Gary wrote:
> >> It's only of academic use to me, but am curious to know what kind of dioptre
> >> change in prescription is possible when the eye is tested the day after
> >> contacts were last worn. Obviously the type of lens worn is a major factor.
> >> Are there any studies/figures around for this?
> >>
> >> TIA
> >> Gary
> >
> >
> >soft contacts normally dont produce a change but ive heard focus day
> >and night contacts causing a mild orthoK effect if worn inside out. RGP
> >contacts often have a mild orthoK effect. When someone wants lasik, he
> >must be out of contacts for a while to remove all doubt and allow the
> >cornea to revert back.
>
> Ace,
>
> On what do you base your statements above? Is it *primarily* your
> clinical research, or is it from your first-hand experience in your
> optometric practice?
>
> Thanks.


most of my knowlege comes from research on the web

On 30 Jun 2006 19:43:06 -0700, (E-Mail Removed) wrote:

>
>Neil Brooks wrote:
>> On 30 Jun 2006 13:13:31 -0700, (E-Mail Removed) wrote:
>>
>> >
>> >Gary wrote:
>> >> It's only of academic use to me, but am curious to know what kind of dioptre
>> >> change in prescription is possible when the eye is tested the day after
>> >> contacts were last worn. Obviously the type of lens worn is a major factor.
>> >> Are there any studies/figures around for this?
>> >>
>> >> TIA
>> >> Gary
>> >
>> >
>> >soft contacts normally dont produce a change but ive heard focus day
>> >and night contacts causing a mild orthoK effect if worn inside out. RGP
>> >contacts often have a mild orthoK effect. When someone wants lasik, he
>> >must be out of contacts for a while to remove all doubt and allow the
>> >cornea to revert back.
>>
>> Ace,
>>
>> On what do you base your statements above? Is it *primarily* your
>> clinical research, or is it from your first-hand experience in your
>> optometric practice?
>>
>> Thanks.
>
>
>most of my knowlege comes from research on the web

Make that your signature, Ace.

Quit screwing with people's eyesight to feed your hungry ego.

I can think of NOTHING more -- as you call it -- "rude."

an excellent recommendation.

you should sign all your posts with "I am not an eye doctor or have any
training in vision science. 100% of what I think I know comes from
reading on the internet."

if you did that i don't think anyone would have any problems with your
constant interjection of comments (which appear to feed your ego rather
than really answer anybody's questions).

===========

(E-Mail Removed) wrote:
> Neil Brooks wrote:
> > On 30 Jun 2006 13:13:31 -0700, (E-Mail Removed) wrote:
> >
> > >
> > >Gary wrote:
> > >> It's only of academic use to me, but am curious to know what kind of dioptre
> > >> change in prescription is possible when the eye is tested the day after
> > >> contacts were last worn. Obviously the type of lens worn is a major factor.
> > >> Are there any studies/figures around for this?
> > >>
> > >> TIA
> > >> Gary
> > >
> > >
> > >soft contacts normally dont produce a change but ive heard focus day
> > >and night contacts causing a mild orthoK effect if worn inside out. RGP
> > >contacts often have a mild orthoK effect. When someone wants lasik, he
> > >must be out of contacts for a while to remove all doubt and allow the
> > >cornea to revert back.
> >
> > Ace,
> >
> > On what do you base your statements above? Is it *primarily* your
> > clinical research, or is it from your first-hand experience in your
> > optometric practice?
> >
> > Thanks.
>
>
> most of my knowlege comes from research on the web

"Dr Judy" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...

> If well fitted and clean, very little. Ill fitting, ill cared for,
> heavily coated lenses are a different story

Okay, many thanks for the info :-)