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Science Forum Index » Medicine - Vision Forum » Stars on vision
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| eddy blanco |
 Posted: Tue Jun 12, 2007 9:06 am |
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Today for the first time I saw many starts on my vision. What is the
cause of this? Lasted about 6 to 8 seconds. |
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| Neil Brooks |
| Posted: Tue Jun 12, 2007 2:10 pm |
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On Jun 12, 7:06 am, eddy blanco <eddybla...@msn.com> wrote:
Quote: Today for the first time I saw many starts on my vision. What is the
cause of this? Lasted about 6 to 8 seconds.
I'm not a doctor, but "seeing stars" can be associated with something
called "visual (or ocular or ophthalmic) migraine:"
http://www.eye-surgeons.net/migraines.htm
http://eugeneeyecare.com/conditions/Ophthalmic_Migraine.html
But ... didn't you take a nasty fall/kick to the head/fracture??
If I were you, I'd go back to your ophthalmologist to be evaluated. |
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| Mike Tyner |
| Posted: Tue Jun 12, 2007 8:47 pm |
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"eddy blanco" <eddyblanco@msn.com> wrote
Quote: Today for the first time I saw many starts on my vision. What is the
cause of this? Lasted about 6 to 8 seconds.
There are two common sources of bright stars.
One is vitreous or retinal detachment. These tend to be peripheral,
disorganized, and almost always one eye.
The second occurs in physical exertion like holding your breath to lift or
bear down. Rushes of blood in the retinal veins create areas of turbulence
that you perceive as specks of light. They twist and wiggle and they're
usually more central, in happen in both eyes at the same time.
The first type calls for making an appointment and getting a dilated retinal
examination. The second type is nothing to worry about.
-MT, OD
"eddy blanco" <eddyblanco@msn.com> wrote in message
news:1181657177.638089.101950@n15g2000prd.googlegroups.com...
Quote: Today for the first time I saw many starts on my vision. What is the
cause of this? Lasted about 6 to 8 seconds.
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| Don W |
| Posted: Wed Jun 13, 2007 2:35 am |
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Quote:
There are two common sources of bright stars.
One is vitreous or retinal detachment. These tend to be peripheral,
disorganized, and almost always one eye.
In my experience, the vitreous detachment, is very transitory. And
a quick movement (jar) of the head/eyes will produce it to last for a
fraction of a second. (A test not to be tried at home).
Quote:
The second occurs in physical exertion like holding your breath to lift or
bear down. Rushes of blood in the retinal veins create areas of turbulence
that you perceive as specks of light. They twist and wiggle and they're
usually more central, in happen in both eyes at the same time.
The retinal veins (are we just talking veins??) do not exist
centrally where the photoreceptors could see them. No arteries or
veins exist in the central field. White blood cells movement has been
reported in the non-central field (that have been observed as white
dot flickers).
So Mike, where is the effect you are talking about documented?
Interested.
Don W. |
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| Mike Tyner |
| Posted: Wed Jun 13, 2007 4:09 am |
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"Don W" <dwilgus@prodigy.net> wrote
Quote: The retinal veins (are we just talking veins??) do not exist
centrally where the photoreceptors could see them.
These stars do not occur in the foveal avascular zone, but that's pretty
small.
Arterioles have muscled walls and are too thick to exhibit the phenomenon.
Venules are softer and have more "give."
Quote: So Mike, where is the effect you are talking about documented?
Interested.
Never researched it. It was discussed at length in a physiology class long
ago.
-MT |
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