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Medical Forum / General / Vision / March 2007

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Confused anisometropic amblyope

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weesonwayne@yahoo.com - 21 Feb 2007 05:35 GMT
It won't be easy but I will try to be brief; in doing so, please
disregard grammatical errors that I will most likely commit!
Amblyopic since childhood, failed eye tests as early as nursery
school, parents took me to Opthalmologist EVERY year where he said I
was fine and that those giving tests didn't know what they were
doing!  They stopped giving eye tests in school after a certain age,
family pediatrician had us read a chart at the end of the hall and I
remember having to peek around paper to see the letters when I was
told to cover my left eye. I always knew one eye was better, but did
not know it was not normal; some hand/eye coordination issues and
depth perception problems, but did not know it should/could be
different so I was able to adapt and excel at things like tennis.
Received diagnosis finally in college and immediately put into
contacts/glasses.  Current Rx is close to the following (it's off the
top of my head so I may be slightly off)...left eye -. 50, -4.75, axis
63/ right eye -.50, -1.50, axis 7, with an add of +3.00 for both.
Sphere has been coming down regularly since first glasses, when it was
around -1.50.  Cylinder fluctuates, has been as high as 5.0 or as low
as 4.0.  age 43, medical professional whose livlihood depends on good
vision in a very small detailed area!  When I first got glasses they
were prescribed for distance; also had hard contacts, which were
uncomfortable but better than the terribly unbalanced thicknesses of
my glasses!  Only wore them as needed, but found I had issues with
close up work, too.  Prescribed bifocals, but at 17 wasn't too keen on
that so got two pair, which is how it remained til  my mid 30's.
Found a great doc who fitted me with soft contacts, but vision was
always better with glasses, I guess due to astigmatism.  Two pair of
glasses go to be a pain (add started at about +.50 and increased
steadily thereafter to current add of 3.00) so I opted for
progressives, which have too small a reading area for me.  Flat tops
next, but with high add there was significant jump.  Biggest issue in
past years has been convergence; I feel when I am working as if my
eyes are NOT working together...always mention to my eye doctor, and
get higher add, which is okay but still not solving problem.  All
through my glasses wearing years I have been able to live in a blur
and wear them while driving or working but for little else.  As add
increased in past years, and my eyes got "older", I have become
completely dependent upon my glasses. Well, I was before too, but
could get used to the blur! If I can somehow still manage to do
something close-up without them, when I look up my distance vision is
a mess.  Contacts still don't give me the clearest vision, hence the
reason I've resigned myself to glasses.  He also tried, and I like,
wearing plus contacts with over-corrected minus glasses over them;
better than my regular glasses ever were but that put me in glasses
pretty much all the time because with +3.0 contacts I wasn't seeing
too clearly in the distance!  But  convergence, or lack thereof, is
becoming a bigger problem when I'm working up close.  Add has gone up
as previously noted, single-vision reading/work glasses are +3.25; to
remedy problem he next suggested lined trifocals, which are fine,
albeit slightly unattractive, but I still felt like I had to "work" to
keep my eyes focused together close up. Next, he recommended a prism
add of 3.0 base-in each eye.  They are by far the BEST glasses I think
I've ever had, though I don't know if it has solved the convergence
issue completely as I still feel like I have to work to focus, though
not as much.  WHen I wear the glasses with the prism, my eyes are
extremely sore when I remove them.  And I feel like my uncorrected
vision has gotten worse since getting them.  My fave doc retired soon
after I got the prisms, and the new doc told me a few things I was not
aware of, namely that with a prism in my glasses that I would, after
getting used to wearing them, not be able to go without glasses ever,
or be able to switch back and forth to contacts if I wanted to.  In
addition, he said that didn't much matter because he absolutely,
POSITIVELY, would not allow me to get contacts, no ifs, ands or buts
about it.  He said that because of the significant loss of vision in
my one eye (uncorrected it is 20/200, corrects to 20/40 -1 or -2) that
I should never have been given contacts in the first place and that I
should NEVER go without glasses to protect my better eye.  Phew.  I
apoloogize for the length of this, but would truly appreciate and
welcome any and all thoughts and suggestions.  Due to my profession, I
would hesitate to do any sort or lasik procedures, as I don't want to
take any risks.  I would rather not be in glasses all the time, but
will heed whatever advice you can send my way.  Many thanks in advance.
Dr Judy - 21 Feb 2007 14:13 GMT
major snip

 My fave doc retired soon
> after I got the prisms, and the new doc told me a few things I was not
> aware of, namely that with a prism in my glasses that I would, after
> getting used to wearing them, not be able to go without glasses ever,
> or be able to switch back and forth to contacts if I wanted to.  

Although somewhat true, the reason is that the prism makes you
comfortable and enhances fusion so that you prefer to wear them. It
does not make the eyes worse.

In
> addition, he said that didn't much matter because he absolutely,
> POSITIVELY, would not allow me to get contacts, no ifs, ands or buts
> about it.  He said that because of the significant loss of vision in
> my one eye (uncorrected it is 20/200, corrects to 20/40 -1

If your BCVA is 20/40, I would disagree with the term "significant
vision"
or -2) that
> I should never have been given contacts in the first place and that I
> should NEVER go without glasses to protect my better eye.  Phew.  I
[quoted text clipped - 3 lines]
> take any risks.  I would rather not be in glasses all the time, but
> will heed whatever advice you can send my way.  Many thanks in advance.

Since prism glasses over contacts are working, stick with it. Prism
cannot be added to glasses or given by LASIK, so if you want the
comfort that prism delivers, you need to resign yourself to wearing
glasses.

Dr Judy
Dr Judy - 22 Feb 2007 15:12 GMT
> major snip
>
> Since prism glasses over contacts are working, stick with it. Prism
> cannot be added to glasses or given by LASIK, so if you want the
> comfort that prism delivers, you need to resign yourself to wearing
> glasses.

Sorry, typo, should read:  prism cannot be added to contacts

> Dr Judy
CatmanX - 22 Feb 2007 19:48 GMT
Prism can be added to contacts.
Dr Judy - 24 Feb 2007 04:27 GMT
> Prism can be added to contacts.

Not Base Out for  eso deviation
William Stacy, O.D. - 24 Feb 2007 19:15 GMT
>>Prism can be added to contacts.
>
> Not Base Out for  eso deviation

Theoretically it should be possible to grind some base out prism in the
optical zone only of a lenticular design, then base down in the carrier.
  You'd have to compensate for some downward movement of the horizontal
prism, but if the lens had a fairly wide carrier, it would overcome most
of that tendency.  Not sure if this has ever been done, and what the
technical problem might be, but it should be possible.

w.stacy, o.d.
weesonwayne@yahoo.com - 14 Mar 2007 04:42 GMT
> >>Prism can be added to contacts.
>
[quoted text clipped - 8 lines]
>
> w.stacy, o.d.

Dr. Stacy,
Can you please elaborate one what a lenticular design is, and what a
carrier is, etc.   I am unfamiliar with the terms except that they are
some type of eyeglass lens?  Would it be helpful in my situation?  I
was going to ask what they look like but in all honestly, these days
'looks' don't matter so much as finding something that is going to
provide clear vision, in the most comfortable manner possible!  The
prism that was prescribed is base-in, 3.0 each eye.  Thank you.
Dr Judy - 14 Mar 2007 04:50 GMT
On Mar 13, 11:42 pm, weesonwa...@yahoo.com wrote:

> > >>Prism can be added to contacts.
>
[quoted text clipped - 17 lines]
> provide clear vision, in the most comfortable manner possible!  The
> prism that was prescribed is base-in, 3.0 each eye.  Thank you.

Bill was discussing adding horizontal prism to contacts, a very
challenging technical problem.  Prism in glasses is easy to do and
they won't look  funny.

Dr Judy
William Stacy - 14 Mar 2007 23:46 GMT
>Dr. Stacy,
>Can you please elaborate one what a lenticular design is, and what a
[quoted text clipped - 6 lines]
>
>  

Lenticular means that the peripheral part of the lens has different
geometry than the main (central) part of the lens, and applies to
contact lenses as well as strong eyeglass lenses.  So if you could
envision a contact lens with base down prism only in the lens periphery,
and base in prism ONLY  in the central part of the lens, it is
theoretically possible.  The weight of the peripheral prism base would
have to considerably exceed the weight of the central prism base for
this to work.  I don't think it's ever been done, and may not be
possible with ordinary lens grinding technology.
William Stacy, O.D. - 24 Feb 2007 19:16 GMT
Or in the case of a soft lens, design the lens like the advance for
astig. toric, with the "speed bump" idea that might be able to overcome
an optic zone only prism.
William Stacy - 22 Feb 2007 22:53 GMT
>It won't be easy but I will try to be brief; in doing so, please
>disregard grammatical errors that I will most likely commit!
>Amblyopic since childhood, failed eye tests as early as nursery
>school, parents took me to Opthalmologist EVERY year where he said I
>was fine and that those giving tests didn't know what they were
>doing!

He was a complete idiot, based on what follows. Maybe you went to Otis
Brown, M.D.?

> Current Rx is close to the following (it's off the
>top of my head so I may be slightly off)...left eye -. 50, -4.75, axis
>63/ right eye -.50, -1.50, axis 7, with an add of +3.00 for both.
>  

You always had that high astigmatism on the right eye, unless you had a
serious corneal or lid disease. The O.M.D. must have been completely
incompetent.

>He said that because of the significant loss of vision in
>my one eye (uncorrected it is 20/200, corrects to 20/40 -1 or -2) that
[quoted text clipped - 6 lines]
>will heed whatever advice you can send my way.  Many thanks in advance.
>  

I disagree with that.    Contacts are fine, but hard to find a decent
fit with that much cyl.  I would rethink not having LASIK in that right
eye. In fact lasik R eye only would be my first choice in your case
assuming your corneas are thick and healthy.
 
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