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Medical Forum / General / Vision / September 2006

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-20 Diopter. Is there any help?

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Kathy - 26 Sep 2006 21:59 GMT
I am trying desperately to help my friend. She is 21 and has progressive
myopia. Her prescription is -21 and -22.5 diopters. She also has astigmatism
of -4.

She says her glasses are so thick that everywhere she goes people point and
laugh. She has developed an extreme case of self consciousness because of
this. She did try hard contact lenses, but said she couldn't wear them
because of dryness and pain after a couple of hours.

Are they any soft contacts available in this high of a prescription? I
should also mention she lives in Germany. She hates to even leave her house
because of the ridicule. Any help or ideas would be appreciated.

Thank you.
Jan - 26 Sep 2006 22:32 GMT
Kathy schreef:
> I am trying desperately to help my friend. She is 21 and has progressive
> myopia. Her prescription is -21 and -22.5 diopters. She also has astigmatism
[quoted text clipped - 8 lines]
> should also mention she lives in Germany. She hates to even leave her house
> because of the ridicule. Any help or ideas would be appreciated.

Kathy, let her ask for the possibility of a so called "piggyback" lens
system.

In short it's a softlens  with on top an RGP (rigid gaspermeable) lens.

The comfort in wearing a softlens combined with the sharpness in vision
of an hard lens.

Let her search for a  contactlensspecialist who is a member of the VDC,
Vereinigung Deutscher Contactlinsspecialisten.

Jan (normally Dutch spoken)
Dr Judy - 27 Sep 2006 03:40 GMT
> I am trying desperately to help my friend. She is 21 and has progressive
> myopia. Her prescription is -21 and -22.5 diopters. She also has astigmatism
[quoted text clipped - 8 lines]
> should also mention she lives in Germany. She hates to even leave her house
> because of the ridicule. Any help or ideas would be appreciated.

Conventional soft lenses are available in her power.  She could also
try wearing disposable soft in the max power (some go up to -15), then
use "normal" looking glasses over them to correct the balance.

I am more concerned to hear of her mental state; she is likely
imagining the pointing and laughter and her refusal to leave the house
is a serious sign.  If you are a true friend, you will try to get her
to talk to a therapist about her self image and self consciousness.
That will do her more good than contact lenses.

Dr Judy
Gary - 27 Sep 2006 12:46 GMT
> I am more concerned to hear of her mental state; she is likely
> imagining the pointing and laughter and her refusal to leave the house
> is a serious sign.  If you are a true friend, you will try to get her
> to talk to a therapist about her self image and self consciousness.
> That will do her more good than contact lenses.

A combination of both would be a good idea in my opinion. Sadly there *are*
people around who ridicule people in this way, and while they may be
pitiable individuals, their behaviour can still impact on a person's self
esteem.

Regards
Gary
Dan Abel - 27 Sep 2006 17:55 GMT
> > I am more concerned to hear of her mental state; she is likely
> > imagining the pointing and laughter and her refusal to leave the house
[quoted text clipped - 6 lines]
> pitiable individuals, their behaviour can still impact on a person's self
> esteem.

Pointing and laughter are not acceptable and probably not very common.  
However, it is not possible to make glasses of that strength that don't
severely distort the face and eyes.  Thus, there will be staring and
funny looks.

Based on my personal experience and what I have read on this group,
contacts are the answer.  Not everyone can wear them, but people with
high correction should try them.  Not only do they make the face and
eyes look more normal, but I find that vision is much better.  

Although I agree with Dr. Judy that perhaps the contacts are less
important than issues with self confidence, I've seen examples of where
people can overcome difficulties with mental issues with a little
physical help.

Signature

Dan Abel
dabel@sonic.net
Petaluma, California, USA

Jan - 27 Sep 2006 20:11 GMT
Dr Judy schreef:
>> I am trying desperately to help my friend. She is 21 and has progressive
>> myopia. Her prescription is -21 and -22.5 diopters. She also has astigmatism
>> of -4.

> Conventional soft lenses are available in her power.  She could also
> try wearing disposable soft in the max power (some go up to -15), then
> use "normal" looking glasses over them to correct the balance.

Indeed there are non disposable toric softlenses with a cylinder.
However, when I hear "progressive myopia" my first choice would be a RGP
contactlens. (in this case a toric one)

> I am more concerned to hear of her mental state; she is likely
> imagining the pointing and laughter and her refusal to leave the house
[quoted text clipped - 3 lines]
>
> Dr Judy

Some times  contactlenses alone are already making the difference.
BTW, wish more people have such concerned friends.

Jan (normally Dutch spoken)
Dr Judy - 27 Sep 2006 03:40 GMT
> I am trying desperately to help my friend. She is 21 and has progressive
> myopia. Her prescription is -21 and -22.5 diopters. She also has astigmatism
[quoted text clipped - 8 lines]
> should also mention she lives in Germany. She hates to even leave her house
> because of the ridicule. Any help or ideas would be appreciated.

Conventional soft lenses are available in her power.  She could also
try wearing disposable soft in the max power (some go up to -15), then
use "normal" looking glasses over them to correct the balance.

I am more concerned to hear of her mental state; she is likely
imagining the pointing and laughter and her refusal to leave the house
is a serious sign.  If you are a true friend, you will try to get her
to talk to a therapist about her self image and self consciousness.
That will do her more good than contact lenses.

Dr Judy
William Stacy - 27 Sep 2006 06:02 GMT
 I
> should also mention she lives in Germany. She hates to even leave her house
> because of the ridicule.

Those crazy germans.  Pointing and laughing?  If they really are doing
that, we should invade them again.
Jan - 27 Sep 2006 20:18 GMT
William Stacy schreef:

> Those crazy germans.  Pointing and laughing?  If they really are doing
> that, we should invade them again.

We'll meet again, don't know where, don't know when ...

Jan (normally Dutch spoken)
William Stacy - 27 Sep 2006 20:28 GMT
Are you referring to Dr. Strangelove, or are you flirting?

> William Stacy schreef:
>
[quoted text clipped - 4 lines]
>
> Jan (normally Dutch spoken)
Jan - 27 Sep 2006 21:05 GMT
William Stacy schreef:
> Are you referring to Dr. Strangelove, or are you flirting?
>
[quoted text clipped - 6 lines]
>>
>> Jan (normally Dutch spoken)

"Have You Forgotten So Soon" William? , I'm "Crying My Heart Out For You"

"I'm in the Mood for Love" and "I Don't Want to Set the World the World
on Fire".

"Auf Wiederseh'n Sweetheart"

"Yours"

Jan (normally Dutch spoken)
William Stacy - 28 Sep 2006 02:01 GMT
Sorry Jan, but something must be lost in the translation.  

> "Have You Forgotten So Soon" William? , I'm "Crying My Heart Out For You"
>
[quoted text clipped - 6 lines]
>
> Jan (normally Dutch spoken)
Jan - 28 Sep 2006 21:19 GMT
William Stacy schreef:
> Sorry Jan, but something must be lost in the translation.

You wanted to invade the Germans again.

Referring to that I respond with "We'll meet again, don't know where,
don't know when ." (song by Vera Lynn WWII)

Well I am to old to explain this to a "youngster" as you are I suppose.

Jan (normally Dutch spoken)
William Stacy - 29 Sep 2006 17:01 GMT
Maybe, but I know that song well, as so ironically played at the ending
of the film Dr. Strangelove, when all the nukes are going off... If you
haven't seen it, it is an absolute must (Peter Sellers best movie, IMO).
Sorry about drifting off topic, and possibly mistaking your sex (my very
first kiss was with a gal with your name).

> William Stacy schreef:
>
[quoted text clipped - 8 lines]
>
> Jan (normally Dutch spoken)
Bryan_kerr292@yahoo.com - 27 Sep 2006 13:40 GMT
> I am trying desperately to help my friend. She is 21 and has progressive
> myopia. Her prescription is -21 and -22.5 diopters. She also has astigmatism
[quoted text clipped - 8 lines]
> should also mention she lives in Germany. She hates to even leave her house
> because of the ridicule. Any help or ideas would be appreciated.

Kathy, my prescription is OD -30, and OS -28.50.  I have gone through
all types of lenses in the past 35 years, and while I know that some of
my glasses are pretty strange looking I have never felt that people
laughed and or ridiculed me.

Soft contact lenses are available in her prescription, although I would
suggest using contact lenses that still require glasses to wear over
them. I suspect that my prescription climbed higher during the years
that I wore soft contacts because I was doing so much close work. So my
suggestion would be to still wear a pair of glasses over the contacts
that she can take of to read and do other close work. The -4D  of
astigmatism is a problem, because toric contact lenses are much more
expensive and harder to obtain.

I suspect that money might be an object, because some of the best
looking pairs of glasses I have had in the past have come from Germany,
from a company called Zeiss, but they were quite expensive
Tresa - 27 Sep 2006 19:44 GMT
> > I am trying desperately to help my friend. She is 21 and has progressive
> > myopia. Her prescription is -21 and -22.5 diopters. She also has astigmatism
[quoted text clipped - 13 lines]
> my glasses are pretty strange looking I have never felt that people
> laughed and or ridiculed me.

bryan, my rx is about the same as yours and never have i experienced
laughing or ridicule. i do get somments from friends and usually on a
first date, but these are good natured and kind, just people wondering
about how bad my eyes are. and i don't even wear those super small
frames wtih high index lenses which can hide quite a bit of thickness,
so my glasses do appear very thick. i think there is something else
going on with this girl, such as a body dismorphic disorder. most of us
have a few flaws in our looks, but we can live with them without too
much trauma.
Kathy - 27 Sep 2006 21:12 GMT
I want to thank everyone for their replies and advice. I have forwarded them
on to her, and am waiting for her to reply. It sounds to me as if there is
hope for her whether it is the "piggyback" lens or just soft lens and
regular glasses. I know she will be thrilled to hear it is not a hopeless
case. Why her own optometrist has not suggested these things, I have no
idea.

Dr. Judy, I also have wondered if the "laughter and pointing" she is
receiving is more in her imagination, and questioned her about that. She
assured me it was not. However, I did suggest therapy to her as well.

I am hoping that if she can wear contacts, it will help immensely with her
self esteem.

Thanks again.

Kathy
Salmon Egg - 28 Sep 2006 00:16 GMT
Out of curiosity, do all of the anatomical components of an eye requiring
such correction appear individually almost normal except for some
exaggerated development? I would expect such an eye to be over two inches
deep. What are typical dimensions for such an eyeball?

Bill
Robert Kopp - 28 Sep 2006 05:04 GMT
> Out of curiosity, do all of the anatomical components of an eye requiring
> such correction appear individually almost normal except for some
> exaggerated development? I would expect such an eye to be over two inches
> deep. What are typical dimensions for such an eyeball?

The axial length of the typical emmetropic eye is 24 mm, plus another mm
for each 3D of refractive error. Actually, according to this formula, it
would be 34 mm for -30D. Perhaps there are other factors involved. I once
visited an ophthalmologist with a very active practice, whose most myopic
patient ever was -37D.

Phakic IOL's can be very strong, and do not involve the same risk of
retinal detachment as CLE. Are they promising for refractive errors of
this magnitude?

Signature

Robert T. Kopp

http://analytic.tripod.com/

Salmon Egg - 28 Sep 2006 22:12 GMT
On 9/27/06 9:04 PM, in article pan.2006.09.28.04.04.27.0@hevanet.com,

>> Out of curiosity, do all of the anatomical components of an eye requiring
>> such correction appear individually almost normal except for some
[quoted text clipped - 10 lines]
> retinal detachment as CLE. Are they promising for refractive errors of
> this magnitude?

I looked up what is probably a similar simple optical model of an eye in the
OSA Handbook of Optics. It gives radii and indexes of various parts of the
eye. I was planning to run a paraxial ray trace to find out whether that
matches the overall value of about 67 diopters quoted. Thus, I would
guesstimate that to get about 33D of myopia would require increasing the
length of the eyeball by about 50%.

If I get around to it, I will calculate how much  the distance between the
cornea's anterior and the orb's posterior has to be increased to get attain
33D of myopia. I will assume that The size and relationship of the cornea
and lens is not affected.

Bill
-- Fermez le Bush
Mike Tyner - 28 Sep 2006 22:51 GMT
> If I get around to it, I will calculate how much  the distance between the
> cornea's anterior and the orb's posterior has to be increased to get
> attain
> 33D of myopia. I will assume that The size and relationship of the cornea
> and lens is not affected.

Here's a better estimate:

1/67D = 15 mm focal length

1/100D=10 mm focal length

The difference would be on the order of 5 mm.

-MT
Salmon Egg - 29 Sep 2006 02:50 GMT
On 9/28/06 2:51 PM, in article
idGdnUtoXc573oHYnZ2dnUVZ_t6dnZ2d@giganews.com, "Mike Tyner"
<mtyner@mindspring.com> wrote:

>> If I get around to it, I will calculate how much  the distance between the
>> cornea's anterior and the orb's posterior has to be increased to get
[quoted text clipped - 11 lines]
>
> -MT

That may not be a good way to go. You have to take into account the index of
refraction of the medium in which the image is formed. It is not a big deal,
but will not be trivial.

Bill
-- Fermez le Bush
Mike Tyner - 29 Sep 2006 03:32 GMT
> That may not be a good way to go. You have to take into account the index
> of
> refraction of the medium in which the image is formed. It is not a big
> deal,
> but will not be trivial.

That's what I thought, at first, and 15 mm isn't right for the axial length
from the corneal pole, either.

But for an estimate, the assumptions are the same for both calculations, so
the difference between them would be more reliable, and perhaps off by 4/3,
the index of water. So my crystal ball says 6.7 mm. I'm curious to see what
you get by raytrace.

-MT
Dr Judy - 29 Sep 2006 04:27 GMT
> > That may not be a good way to go. You have to take into account the index
> > of
[quoted text clipped - 11 lines]
>
> -MT

Its also quite possible that all the myopia is not axial.  There may be
changes in lens density and thickness.  After all,  progressive myopia
at that level is associated with early cataract so lens changes may
well be involved.

Dr Judy

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