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Visual Migraine
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judy.n@gmail.com
medicine forum beginner


Joined: 26 May 2006
Posts: 9

PostPosted: Sat May 27, 2006 1:22 pm    Post subject: Re: Visual Migraine Reply with quote

Bill,
I agree with you. The lens is actually not really supplied with
direct blood vessels, the ocular symptoms of migraine are due to
disturbances in the cortex of the brain that controls vision and/or the
optic nerve. The lens only refracts light, it doesn't produce
vision--that's what the retina and brain are for. At least that's my
current understanding of the mechanism for visual changes in migraine
and opthalmic migraine. (Without doing some basic research into this.)
Judy
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Repeating Rifle
medicine forum Guru Wannabe


Joined: 04 May 2005
Posts: 141

PostPosted: Sat May 27, 2006 6:59 am    Post subject: Re: Visual Migraine Reply with quote

On 5/26/06 9:46 PM, in article
1148705198.722080.295630@j33g2000cwa.googlegroups.com, "Radium"
<glucegen@excite.com> wrote:

Quote:
Visual migraine affects the lens of the left eye causing auras. The
blood vessels supplying the lens constrict suddenly and completely.
This starves the lens of necessary proteins it can only recieve from
the blood (hemoglobin included). Symptoms are:

1. Visual distortion; 2-D images appear 3-D; visual hallucinations
2. Loss of image perception
3. Loss of color perception
4. Intense aching pain in that lens due to protein starvation
5. Sudden and complete blindess; subject cannot tell even dark or
light!; the description is usualy "seeing nothing at all", no light, no
darkness. Just totaly blank. Wierd feeling!

I think this posted "information" is incorrect. I am not a health

professional. I presume you mean ocular migraine.

Having suffered through ocular migraine, I was informed by ophthalmologists
and neurologists, that this phenomenon is not related to defects of the eye
itself. It is caused by not well understood neurological factors after
signals from the retina pass through the optic nerve chiasm.

Of course, your problem might be something else.

Bill
-- Ferme le Bush
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Green
medicine forum beginner


Joined: 05 May 2006
Posts: 7

PostPosted: Sat May 27, 2006 4:46 am    Post subject: Visual Migraine Reply with quote

Visual migraine affects the lens of the left eye causing auras. The
blood vessels supplying the lens constrict suddenly and completely.
This starves the lens of necessary proteins it can only recieve from
the blood (hemoglobin included). Symptoms are:

1. Visual distortion; 2-D images appear 3-D; visual hallucinations
2. Loss of image perception
3. Loss of color perception
4. Intense aching pain in that lens due to protein starvation
5. Sudden and complete blindess; subject cannot tell even dark or
light!; the description is usualy "seeing nothing at all", no light, no
darkness. Just totaly blank. Wierd feeling!
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