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Medical Forum / General / Vision / October 2006

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How does a visual field test affect treatment?

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Salmon Egg - 22 Oct 2006 20:04 GMT
I have had a number of visual field tests. They have shown that I have
significant loss of vision in my left eye from central retinal vein
occlusion. Peripheral vision in that eye is good. I have slightly elevated
pressure in my right eye. I am supposed to get another visual field test
during my next visit. I understand that such a test will document new
changes in my visual field. My question is: If such a loss of field is
discovered, how would it affect subsequent treatment?

I am already being treated for elevated pressure in my eyes. Is that
treatment going to be less intensive if no further loss of field is found?

Bill
-- Fermez le Bush
Dr Judy - 23 Oct 2006 03:29 GMT
> I have had a number of visual field tests. They have shown that I have
> significant loss of vision in my left eye from central retinal vein
[quoted text clipped - 6 lines]
> I am already being treated for elevated pressure in my eyes. Is that
> treatment going to be less intensive if no further loss of field is found?

Are you currently being treated for glaucoma in the right eye?

If so, and the field is not getting worse, then likely your glaucoma
treatment will not be changed as it is working.  If the field is worse,
then your glaucoma treatment will likely be changed to get better
control.  

Dr Judy

Dr Judy

> Bill
> -- Fermez le Bush
Don W - 23 Oct 2006 04:24 GMT
How accurate would a field test be in tracking changes in macular
degeneration?

Don W.
drfrank21@gmail.com - 23 Oct 2006 05:19 GMT
> How accurate would a field test be in tracking changes in macular
> degeneration?
>
> Don W.

An amsler grid can be helpful in early or mild stages. Usually, in
moderate or end stage picking up any changes with the grid
would be more difficult. I'll always give and instruct all of my
patients with early armd an amsler grid for them to look at it on a
regular basis.

frank
Don W - 24 Oct 2006 06:18 GMT
>> How accurate would a field test be in tracking changes in macular
>> degeneration?
[quoted text clipped - 8 lines]
>
> frank

Hope this works, have had several attempts to contact via Google Groups with
problems.  This is via Newsgroup input.
Anyway......

I am speculating if changes in the field test, like in the rates of change
from one time period to the other, would give some idea of the scotoma (gray
spot in visual field)settling down or what?

Don W.
CatmanX - 23 Oct 2006 13:22 GMT
In the case of ARM, the static fields are the best way to monitor
progression. Find an OD that practices optometric phototherapy and they
can do a more sensitive test to evaluate the central field than a field
screener.

Remember to supplement your diet with multivitamins, especially
vitamins A, C and E, zinc, lutein and any other anti-oxidant you can
get.

Also eat as much green leafy vegetables as you can. Cabbage, lettuce,
spinach, parsley, broccoli and brussel sprouts are full of anti-oxidant
compounds which are readily absorbed by the body.

dr grant
Salmon Egg - 23 Oct 2006 04:46 GMT
On 10/22/06 7:29 PM, in article
1161570599.689629.262160@h48g2000cwc.googlegroups.com, "Dr Judy"
<mpace99@rogers.com> wrote:

> Are you currently being treated for glaucoma in the right eye?
>
> If so, and the field is not getting worse, then likely your glaucoma
> treatment will not be changed as it is working.  If the field is worse,
> then your glaucoma treatment will likely be changed to get better
> control.  

I am being treated using Xalatan with Alphgan added because of measured
eyeball pressure.

With that specifically in mind, how will a visual field test finding change
my treatment? Is the visual field test superfluous? If I have further
reduction of field, will I be prescribed a cannabis product? :=) Is the main
purpose to provide extra income? I am getting more paranoid as I age.

Bill
-- Fermez le Bush
Dr Judy - 23 Oct 2006 16:48 GMT
> On 10/22/06 7:29 PM, in article
> 1161570599.689629.262160@h48g2000cwc.googlegroups.com, "Dr Judy"
[quoted text clipped - 14 lines]
> reduction of field, will I be prescribed a cannabis product? :=) Is the main
> purpose to provide extra income? I am getting more paranoid as I age.

The visual field test is the major method of monitoring your glaucoma,
it is equivalent to the doctor checking your blood pressure when
treating you for hypertension. The only ways to monitor disease
progression in glaucoma are vision field test and direct nerve fiber
imaging tests (at least twice the cost of a field).  It is not just a
way for the doctor to make money.

Glaucoma is a disease of the optic nerve in which some of the nerve
fibers in the nerve are damaged and die; the loss of nerve fibers leads
to visual field loss.  Although the disease is often accompanied by
elevated pressure in the eye and using drops that lower the pressure
slows the nerve fiber loss, the pressure alone does not define the
disease.  In other words, knowing that your pressure is normal does not
mean that you do not have disease or progression of disease.

If your visual field loss is progressing, your eye doctor will modify
your treatment.  Modification could be adding another drop, changing
the current drops, adding an oral agent or doing one of several
surgical treatments.  What is done will depend upon the details of your
particular case.  Cannibis is unlikely, as the few controlled studies
with it didn't find it to be very effective and the side effects are
dramatic.

Dr Judy

> Bill
> -- Fermez le Bush
 
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