Sodiium vapor light color.

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Don W - 23 Jul 2005 22:05 GMT

If one eye sees the color of a sodium vapor light (at night) as its normal
yellowish color and the other eye sees it as a brilliant white, what could
cause this difference?

Thanks.

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Repeating Rifle - 23 Jul 2005 23:30 GMT

On 7/23/05 2:05 PM, in article ziyEe.1362$602.4@newssvr31.news.prodigy.com,

> If one eye sees the color of a sodium vapor light (at night) as its normal
> yellowish color and the other eye sees it as a brilliant white, what could
> cause this difference?
>
> Thanks.

This sounds mighty strange. Could it be that you are viewing a high pressure
sodium lamp (sort of white) with one eye while viewing through a cataract
that filters and dims with the other eye?

I also noticed, in my own case, that central retinal vein occlusion
preferentially killed my red sensitive cones.

Bill

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Mike Tyner - 23 Jul 2005 23:36 GMT

> If one eye sees the color of a sodium vapor light (at night) as its
> normal yellowish color and the other eye sees it as a brilliant white,
> what could cause this difference?

Early cataracts act like yellow filters, but that type of cataract is
usually bilateral.

Subtle optic nerve disease can cause color distortion in one eye. If reds
look consistently and significantly different left-vs-right, it's best to
get a checkup.

Finally, just closing one eye for a minute can cause a color and brightness
difference that fades away again after both eyes are open.

-MT

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Don W - 24 Jul 2005 03:32 GMT

>> If one eye sees the color of a sodium vapor light (at night) as its
>> normal yellowish color and the other eye sees it as a brilliant white,
[quoted text clipped - 11 lines]
>
> -MT

Suspect cataracts in both eyes, but have had Macugen shots (2) in "white
seeing eye" for ARMD. Not sure of this visual difference before that. The
moon with left eye is yellowish and is correct white with right eye. Did
not expect a color shift with this problem. Ophthalmologist could not
explain.

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Tom - 24 Jul 2005 06:55 GMT

>>> If one eye sees the color of a sodium vapor light (at night) as its
>>> normal yellowish color and the other eye sees it as a brilliant white,
[quoted text clipped - 17 lines]
>not expect a color shift with this problem. Ophthalmologist could not
>explain.

My daughter sees slightly different colour with both eyes. She's been
checked out by the hospital and they could find nothing wrong and put
it down to normal differences with a rider that she should go back if
anything else odd occurs.

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Repeating Rifle - 24 Jul 2005 18:47 GMT

On 7/23/05 10:55 PM, in article v7b6e1h57lp6rvci0sufklu0qhd19i7ord@4ax.com,

> My daughter sees slightly different colour with both eyes. She's been
> checked out by the hospital and they could find nothing wrong and put
> it down to normal differences with a rider that she should go back if
> anything else odd occurs.

I can think of various reasons for that to be true subjectively. For
example, a slight difference in the cone density populations for the various
colors can do that.

It is very difficult to decide whether different people with normal color
vision perceive color in the same way. That is why color matching is usually
used instead of attempts at absolute colorimetry, whatever that might be. I
doubt that you would go through the expense of finding out whether color
perceived in one eye can be matched to a color perceived in the other eye.

To answer a curiosity it may be worthwhile and reasonably cost effective to
find out if different tristimulus matches in one eye stay matched in the
other eye. I doubt, however, that knowing that would have any medical
benefit.

Bill

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