Can't figure out what's wrong with my glasses...
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GR
Mar 11, 2008, 1:38:13 AM3/11/08
to GlassyEyes
OK, I'll try to make this brief.
I had a 2003 prescription for glasses of
Right: Sph. -6.25; Cyl -0.25; Axis 180
Left: Sph. -6.75; Cyl -0.25; Axis 95
(This prescription still works fine for me)
Last month, Feb 2008, I went to a local optometry school as they have
free eye exams (I am a student at a different school and don't have
much cash right now).
I got a new prescription of
Right: Sph. -6.50; Cyl 0.00; Axis 000
Left: Sph. -6.50; Cyl -0.50; Axis 84
I then proceeded to order 2 pairs of eyeglasses online from
Optical4Less. They send me my two beautiful frames within 2 weeks. I
was happy until...I put on the glasses.
When I but each pair on, I can see fine out of my Right eye, but I its
fuzzy beyond 30 feet in my Left eye.
I went back to the optometry school and they checked my prescription
and found it to be correct as they measured it in Feb 2008. They also
checked my glasses and found the prescriptions to be correct.
They then proceeded to tell me that I was experiencing left eye visual
blurring due to a "Prism-effect" because of the strength of my
correction AND because the OPTICAL CENTER was not over my pupils.
I left there not knowing who to believe and what I should do.
Has anyone else even heard of an optical center making that much of a
difference?
A couple of things I'd like to point out (which I tried to point out
to the Optometry supervising doctor at the school and didn't get a
straight answer for) and still wondering about:
1) Can an eye Axis change from 95 to 84 in five years?
2) Has anyone experienced their eyes improving -0.25 diopters in five
years?
3) Would a -0.25 diopters deficit make a difference for my vision (the
optometry school said it wouldn't be noticable)?
4) What is an optical center and would it create that much of a prism
as to make my vision blurry.
An answer to any or all of the questions I have would be very much
appreciated.
Thank you,
Gibran
I had a 2003 prescription for glasses of
Right: Sph. -6.25; Cyl -0.25; Axis 180
Left: Sph. -6.75; Cyl -0.25; Axis 95
(This prescription still works fine for me)
Last month, Feb 2008, I went to a local optometry school as they have
free eye exams (I am a student at a different school and don't have
much cash right now).
I got a new prescription of
Right: Sph. -6.50; Cyl 0.00; Axis 000
Left: Sph. -6.50; Cyl -0.50; Axis 84
I then proceeded to order 2 pairs of eyeglasses online from
Optical4Less. They send me my two beautiful frames within 2 weeks. I
was happy until...I put on the glasses.
When I but each pair on, I can see fine out of my Right eye, but I its
fuzzy beyond 30 feet in my Left eye.
I went back to the optometry school and they checked my prescription
and found it to be correct as they measured it in Feb 2008. They also
checked my glasses and found the prescriptions to be correct.
They then proceeded to tell me that I was experiencing left eye visual
blurring due to a "Prism-effect" because of the strength of my
correction AND because the OPTICAL CENTER was not over my pupils.
I left there not knowing who to believe and what I should do.
Has anyone else even heard of an optical center making that much of a
difference?
A couple of things I'd like to point out (which I tried to point out
to the Optometry supervising doctor at the school and didn't get a
straight answer for) and still wondering about:
1) Can an eye Axis change from 95 to 84 in five years?
2) Has anyone experienced their eyes improving -0.25 diopters in five
years?
3) Would a -0.25 diopters deficit make a difference for my vision (the
optometry school said it wouldn't be noticable)?
4) What is an optical center and would it create that much of a prism
as to make my vision blurry.
An answer to any or all of the questions I have would be very much
appreciated.
Thank you,
Gibran
undone
Mar 11, 2008, 1:11:10 PM3/11/08
to GlassyEyes
I don't know about the diopter changes in your case, but it does seem
very strange that your right eye's axis changed from 180 to 000!
very strange that your right eye's axis changed from 180 to 000!
Pau...@yahoo.com
Mar 11, 2008, 2:59:13 PM3/11/08
to GlassyEyes
The axis can change at any time. It is the correction for your
astigmatism and ranges from 0 to 180 degrees. Once you hit 180,
you're essentially back to 0.
Yes, the diopter measurement can improve over time. You get a little
less nearsighted as you approach middle age, because you're getting a
bit of presbyopia. At some point, usually around age 40, you'll
either have to get bi-focals, progressives, or get 2 pairs of glasses
(which is what I do).
As for the optical center, I think what they're saying is that your
Pupillary Distance is off. This is the measurement that is from 35mm
to 95mm that is the distance from the center of one pupil to the
other. That stays the same over time once you're an adult. Did the
OP school measure this for you, or did you do it yourself?
astigmatism and ranges from 0 to 180 degrees. Once you hit 180,
you're essentially back to 0.
Yes, the diopter measurement can improve over time. You get a little
less nearsighted as you approach middle age, because you're getting a
bit of presbyopia. At some point, usually around age 40, you'll
either have to get bi-focals, progressives, or get 2 pairs of glasses
(which is what I do).
As for the optical center, I think what they're saying is that your
Pupillary Distance is off. This is the measurement that is from 35mm
to 95mm that is the distance from the center of one pupil to the
other. That stays the same over time once you're an adult. Did the
OP school measure this for you, or did you do it yourself?
Charles Knight
Mar 11, 2008, 3:15:40 PM3/11/08
to undone, GlassyEyes
Yeah...though, according to your prescription, your cylinder was only -.25 (hardly anything) and at a specific angle. Now that it's 0...of course the angle is 0.
I was told that diopter differences of only .25 or so, are hardly noticeable. In fact, unless their equipment is very precisely calibrated, it's also very difficult to measure! But, given that you can't see, something is definitely wrong.
I'd go have them measure your PD...and compare it to the optical centers of the lenses. They should be darned close...and they *ought* to be identical!
Who made your glasses? Which e-tailer?
-- Chuck Knight
P.S. Since you asked what an optical center is...let me explain it this way.
Take an old fashioned magnifying glass. Circular magnifying lens. Its "optical center" is in the center of the lens...it's the thickest part, and is the "center" of the lens. Now...cut out an eyeglass shape, but off center. The "optical center" will still be in the same place on the lens, but relative to the edges, it may not be in the middle.
You want the optical center of the lens to be in front of the pupil (dark spot) of your eye. If it's not located there, then it'll create some minor distortion...increasing in severity with stronger prescriptions. Yours is a fairly strong prescription.
I was told that diopter differences of only .25 or so, are hardly noticeable. In fact, unless their equipment is very precisely calibrated, it's also very difficult to measure! But, given that you can't see, something is definitely wrong.
I'd go have them measure your PD...and compare it to the optical centers of the lenses. They should be darned close...and they *ought* to be identical!
Who made your glasses? Which e-tailer?
-- Chuck Knight
P.S. Since you asked what an optical center is...let me explain it this way.
Take an old fashioned magnifying glass. Circular magnifying lens. Its "optical center" is in the center of the lens...it's the thickest part, and is the "center" of the lens. Now...cut out an eyeglass shape, but off center. The "optical center" will still be in the same place on the lens, but relative to the edges, it may not be in the middle.
You want the optical center of the lens to be in front of the pupil (dark spot) of your eye. If it's not located there, then it'll create some minor distortion...increasing in severity with stronger prescriptions. Yours is a fairly strong prescription.
powrwrap
Mar 11, 2008, 5:04:24 PM3/11/08
to GlassyEyes
> 2) Has anyone experienced their eyes improving -0.25 diopters in five
> years?
I've improved .50 diopters in four years.
> years?
> 3) Would a -0.25 diopters deficit make a difference for my vision (the
> optometry school said it wouldn't be noticable)?
they are off by .25 diopters. I hardly notice it unless I'm trying to
focus on something quite a distance away, i.e. more than 100 feet or
so.
warhorse
Mar 12, 2008, 9:04:32 AM3/12/08
to GlassyEyes
My two cents:
> 1) Can an eye Axis change from 95 to 84 in five years?
Yes. My axis changed from 85 to 95 within 6 months - and it took me a
few weeks to get used to it.
I thought for sure that the glasses were made wrong . . . .
>2) Has anyone experienced their eyes improving -0.25 diopters in five
> years?
Yes. When I was in college my vision actually improved for a few
years.
> 3) Would a -0.25 diopters deficit make a difference for my vision (the
> optometry school said it wouldn't be noticeable)?
For some people, YES! I have a lazy eye, and if I am a quarter
diopter off in either eye I get terrible headaches. When I wore
contacts, a quarter diopter would make everything blurry, to the point
where the eye that was off would see double.
Did the school give you your PD measurement?
Liz
> 1) Can an eye Axis change from 95 to 84 in five years?
few weeks to get used to it.
I thought for sure that the glasses were made wrong . . . .
>2) Has anyone experienced their eyes improving -0.25 diopters in five
> years?
years.
> 3) Would a -0.25 diopters deficit make a difference for my vision (the
For some people, YES! I have a lazy eye, and if I am a quarter
diopter off in either eye I get terrible headaches. When I wore
contacts, a quarter diopter would make everything blurry, to the point
where the eye that was off would see double.
Did the school give you your PD measurement?
Liz
mzdtk
Mar 12, 2008, 8:33:53 AM3/12/08
to GlassyEyes
I was cleaning out a few things in the catch all drawer and came
across my prescription from 07/07/2003 it was:
OD -2.00 2Base in
OS -3.00 -0.75 095 2 base in add for both +1.75
A couple months ago my vision changed rapidly I was looking out thru
my reading rx for distance as it turned out my cataracts that are not
in my line of vision at this point have grown and changed the shape of
my eyes. My doctor even used a new piece of equiptment to take a
picture of the back of my eye (He is a tech junkie and I mean the
sales person used me to teach them how to use their ny toy) all was
fine
My new Rx is
OD -.075 add +1.75
OS -1.75 -0.75 105 add +1.75
I have two things that ensure that I go and have my eyes checked at
least annually. Yes your rx can change even almost overnight.
I hope it helps. Honestly if you are the least bit concerned go see an
opthomologist. They will rake the time with you and explain
everything. I have been to dental schools and know that a person
supervicing several students does not have the time to explain
everything. Check the biggest local hospital they may have a clinic
and since you are a studen you may qualify for free care.
across my prescription from 07/07/2003 it was:
OD -2.00 2Base in
OS -3.00 -0.75 095 2 base in add for both +1.75
A couple months ago my vision changed rapidly I was looking out thru
my reading rx for distance as it turned out my cataracts that are not
in my line of vision at this point have grown and changed the shape of
my eyes. My doctor even used a new piece of equiptment to take a
picture of the back of my eye (He is a tech junkie and I mean the
sales person used me to teach them how to use their ny toy) all was
fine
My new Rx is
OD -.075 add +1.75
OS -1.75 -0.75 105 add +1.75
I have two things that ensure that I go and have my eyes checked at
least annually. Yes your rx can change even almost overnight.
I hope it helps. Honestly if you are the least bit concerned go see an
opthomologist. They will rake the time with you and explain
everything. I have been to dental schools and know that a person
supervicing several students does not have the time to explain
everything. Check the biggest local hospital they may have a clinic
and since you are a studen you may qualify for free care.
Fred Di
Mar 13, 2008, 10:42:17 AM3/13/08
to GlassyEyes
If your cyl is 0.00, then the axis is irrelevnat
you don't have astigmatism in that eye.
My perscription changed in a very similar manner to youts.
Astigamtism went atay in one eye,
and eyesight improved a tad in the other.
But I can still use my old glasses, there's not that much difference.
0.25 change is barely noticible.
My guess is PD error.
Or you may be having some other weird problem, that would require an
Opthamologist to diagnose.
Right: Sph. -6.50; Cyl 0.00; Axis 000
Left: Sph. -6.50; Cyl -0.50; Axis 84
> > Gibran- Hide quoted text -
>
> - Show quoted text -
you don't have astigmatism in that eye.
My perscription changed in a very similar manner to youts.
Astigamtism went atay in one eye,
and eyesight improved a tad in the other.
But I can still use my old glasses, there's not that much difference.
0.25 change is barely noticible.
My guess is PD error.
Or you may be having some other weird problem, that would require an
Opthamologist to diagnose.
Right: Sph. -6.50; Cyl 0.00; Axis 000
Left: Sph. -6.50; Cyl -0.50; Axis 84
>
> - Show quoted text -
Pau...@yahoo.com
Mar 13, 2008, 6:02:27 PM3/13/08
to GlassyEyes
FYI, if you have blood sugar problems (diabetes, etc.) that can affect
your vision too.
your vision too.
IMQ
Mar 16, 2008, 11:38:55 AM3/16/08
to GlassyEyes
Hello everyone!
I just had an eye examination for both contact lens and eyeglasses a
couple of weeks ago. It seems my prescription for distance vision
hasn't changed much over the years but I now wear multifocal lens
instead. Getting old I say.
The doctor gave me the prescription for both contact lens and
eyeglasses:
Contact:
OD: -2.50 Add +2.00
OS: -2.50 Add +1.50
Eyeglasses:
for both eyes: SPH: -2.50 CYL: -0.50 AXIS: 180 ADD: +1.50
Is it normal to have different prescriptions for contact lens and
eyeglasses? What is the significant of the CYL & AXIS in my case?
I am more curious than concern of the difference. From my limited
understanding, the CYL & AXIS are corrections for astigmatism. Am I
correct in my understanding?
On a side note, I came across this web site (more pecisely "Eyeglasses
Stores Are for Suckers") when I googled for comments/feedback/review
on rimless frames.
Because of the overall impression of good experience of many people
reported here, I placed a couple orders for my single focal
eyeglasses: one with Optical4Less and one with Zenni. Looking forward
to their arrival. Hopefully, my experiences will be good of ones.
I just had an eye examination for both contact lens and eyeglasses a
couple of weeks ago. It seems my prescription for distance vision
hasn't changed much over the years but I now wear multifocal lens
instead. Getting old I say.
The doctor gave me the prescription for both contact lens and
eyeglasses:
Contact:
OD: -2.50 Add +2.00
OS: -2.50 Add +1.50
Eyeglasses:
for both eyes: SPH: -2.50 CYL: -0.50 AXIS: 180 ADD: +1.50
Is it normal to have different prescriptions for contact lens and
eyeglasses? What is the significant of the CYL & AXIS in my case?
I am more curious than concern of the difference. From my limited
understanding, the CYL & AXIS are corrections for astigmatism. Am I
correct in my understanding?
On a side note, I came across this web site (more pecisely "Eyeglasses
Stores Are for Suckers") when I googled for comments/feedback/review
on rimless frames.
Because of the overall impression of good experience of many people
reported here, I placed a couple orders for my single focal
eyeglasses: one with Optical4Less and one with Zenni. Looking forward
to their arrival. Hopefully, my experiences will be good of ones.
Chuck
Mar 16, 2008, 5:37:38 PM3/16/08
to GlassyEyes
The CYL means cylinder...and it's the correction for the astigmatism.
The AXIS is the angle (amount of twist) at which you need to apply the
astigmatism correction.
-- Chuck Knight
The AXIS is the angle (amount of twist) at which you need to apply the
astigmatism correction.
-- Chuck Knight
IMQ
Mar 16, 2008, 10:24:53 PM3/16/08
to GlassyEyes
Hi Chuck,
First of all, thanks for the comment.
I do know what CYL and AXIS stand for although I don't really know if
it is heavy or light in my case. Must be light because I can still see
quite well with my 13-year-old glasses. The only reason I need new
glasses because the temple on this old frame is now broken.
I just wonder why my contact lens prescription do not includes them.
Since this is my first time getting the prescriptions for both, I
don't know if it is normal for them to be not identical.
First of all, thanks for the comment.
I do know what CYL and AXIS stand for although I don't really know if
it is heavy or light in my case. Must be light because I can still see
quite well with my 13-year-old glasses. The only reason I need new
glasses because the temple on this old frame is now broken.
I just wonder why my contact lens prescription do not includes them.
Since this is my first time getting the prescriptions for both, I
don't know if it is normal for them to be not identical.
Fred Di
Mar 18, 2008, 10:38:25 AM3/18/08
to GlassyEyes
Well there is no astigmatism in your contact lense perscription.
And 0.50 is a rather small amount of astigmatism, the common range is
0.25 to 3.00, so you are on the low end.
I don't wear contacts, but the lense has to be rotated to the correct
position for the astigmatism correction to be effective. As I
understand it, contacts with astigmatism are weighted so they normally
rotate on thier own to the correct position. I'm guessing this
doesn't work perfectly, and since your astignatism is very small, your
Dr probabally felt that you'd be better off without it in the
contracts.
> > -- Chuck Knight- Hide quoted text -
And 0.50 is a rather small amount of astigmatism, the common range is
0.25 to 3.00, so you are on the low end.
I don't wear contacts, but the lense has to be rotated to the correct
position for the astigmatism correction to be effective. As I
understand it, contacts with astigmatism are weighted so they normally
rotate on thier own to the correct position. I'm guessing this
doesn't work perfectly, and since your astignatism is very small, your
Dr probabally felt that you'd be better off without it in the
contracts.
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