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Gary
medicine forum beginner
Joined: 18 Nov 2005
Posts: 21
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 Posted: Fri Jun 30, 2006 9:33 am Post subject:
Change in prescription due to contact lens?
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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 |
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Dr. Leukoma
medicine forum Guru
Joined: 30 Apr 2005
Posts: 1283
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| Posted: Fri Jun 30, 2006 11:33 am Post subject:
Re: Change in prescription due to contact lens?
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Gary wrote:
| Quote: | 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
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The extreme example of this is in overnight orthokeratology, where a 2
to 3 diopter change is possible.
DrG |
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Dr Judy
medicine forum Guru
Joined: 07 May 2005
Posts: 304
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| Posted: Fri Jun 30, 2006 3:00 pm Post subject:
Re: Change in prescription due to contact lens?
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Gary wrote:
| Quote: | 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 |
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Gary
medicine forum beginner
Joined: 18 Nov 2005
Posts: 21
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| Posted: Fri Jun 30, 2006 6:02 pm Post subject:
Re: Change in prescription due to contact lens?
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"Dr Judy" <mpace99@rogers.com> wrote in message
news:1151679628.861295.193970@75g2000cwc.googlegroups.com...
| Quote: | With well fitting soft lenses, very little. Well fitting rigid gas
perms may show up to 1D both in sphere and cyl.
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Thanks. How about soft toric lenses? Still 'very little'? |
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acemanvx@yahoo.com
medicine forum Guru
Joined: 15 Nov 2005
Posts: 732
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| Posted: Fri Jun 30, 2006 8:13 pm Post subject:
Re: Change in prescription due to contact lens?
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Gary wrote:
| Quote: | 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. |
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Neil Brooks
medicine forum Guru
Joined: 24 Mar 2005
Posts: 1148
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| Posted: Fri Jun 30, 2006 10:04 pm Post subject:
Re: Change in prescription due to contact lens?
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On 30 Jun 2006 13:13:31 -0700, acemanvx@yahoo.com wrote:
| Quote: |
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.
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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. |
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biscuit
medicine forum Guru Wannabe
Joined: 24 Apr 2005
Posts: 296
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| Posted: Fri Jun 30, 2006 10:11 pm Post subject:
Re: Change in prescription due to contact lens?
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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:
| Quote: |
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
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acemanvx@yahoo.com
medicine forum Guru
Joined: 15 Nov 2005
Posts: 732
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| Posted: Sat Jul 01, 2006 2:43 am Post subject:
Re: Change in prescription due to contact lens?
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Neil Brooks wrote:
| Quote: | On 30 Jun 2006 13:13:31 -0700, acemanvx@yahoo.com 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 |
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Neil Brooks
medicine forum Guru
Joined: 24 Mar 2005
Posts: 1148
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| Posted: Sat Jul 01, 2006 3:13 am Post subject:
Re: Change in prescription due to contact lens?
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On 30 Jun 2006 19:43:06 -0700, acemanvx@yahoo.com wrote:
| Quote: |
Neil Brooks wrote:
On 30 Jun 2006 13:13:31 -0700, acemanvx@yahoo.com 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
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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." |
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Dr Judy
medicine forum Guru
Joined: 07 May 2005
Posts: 304
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| Posted: Sat Jul 01, 2006 5:59 pm Post subject:
Re: Change in prescription due to contact lens?
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Gary wrote:
| Quote: | "Dr Judy" <mpace99@rogers.com> wrote in message
news:1151679628.861295.193970@75g2000cwc.googlegroups.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'?
|
If well fitted and clean, very little. Ill fitting, ill cared for,
heavily coated lenses are a different story |
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retinula@hotmail.com
medicine forum beginner
Joined: 14 Nov 2005
Posts: 44
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| Posted: Sat Jul 01, 2006 7:25 pm Post subject:
Re: Change in prescription due to contact lens?
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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).
===========
acemanvx@yahoo.com wrote:
| Quote: | Neil Brooks wrote:
On 30 Jun 2006 13:13:31 -0700, acemanvx@yahoo.com 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 |
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Gary
medicine forum beginner
Joined: 18 Nov 2005
Posts: 21
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| Posted: Mon Jul 03, 2006 10:43 am Post subject:
Re: Change in prescription due to contact lens?
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"Dr Judy" <mpace99@rogers.com> wrote in message
news:1151776755.489733.218250@m73g2000cwd.googlegroups.com...
| Quote: | If well fitted and clean, very little. Ill fitting, ill cared for,
heavily coated lenses are a different story
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Okay, many thanks for the info  |
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