Posted: 10/7/2016 9:14:16 AM EDT
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Ok, weird question. I've noticed this effect for a long time, but it seems worse now that it was before.
I don't wear glasses. Last time I got my eyes checked (7+ years ago) I had 20/10 vision with slight astigmatism. This effect is going to be hard to explain, so bare with me. If I'm looking at a level line with both eyes open and my head level, and close my left eye the line suddenly slopes down to the right. If I keep my left eye open and close my right eye, the line slopes down to the left. I'm talking about a 10-15 deg difference between eyes. But if they are both open they quickly merge back together and I see one line. Is that normal? |
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Mine do that as well. When both eyes have something to focus on, they will align.
When you go to the eyedoctor and they have you look in that machine with the musical notes, that measures the misalignment. If I remember right, the arrow points at the 3 or 4 when I look into that machine, which is left of center. My eyes also see very slightly different color variations. Shades of blues or greens look very slightly different when I close one eye. |
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Quoted:
Mine do that as well. When both eyes have something to focus on, they will align. When you go to the eyedoctor and they have you look in that machine with the musical notes, that measures the misalignment. If I remember right, the arrow points at the 3 or 4 when I look into that machine, which is left of center. My eyes also see very slightly different color variations. Shades of blues or greens look very slightly different when I close one eye. Interesting. Thanks for that post |
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Same here, I see certain details slightly doubled or out of alignment depending on how I look at them. I wear glasses and have astigmatism.
The first time I noticed it was after a bad car wreck several years ago when the back of my head impacted the headrest and broke it right out of the seat. The eye doctor measured a slight double vision and said my brain would likely figure out how to compensate without prismatic glasses. It did but it was really hard to read for a few months - I was stumbling over short words like it, if, an, and, etc. |
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After suffering from a bout of temporary double vision, a neuro-opthamalogist diagnosed me with congenital 4th Nerve palsy. He told me I had always had the vision issue, but my brain had always compensated for the disparity. Sometimes a blow to the head resets the "software" and the double vision becomes apparent. Mine eventually resolved itself after a couple of months. I did have to wear a temporary Fresnal lense on my glasses (astigmatism too).
The way he explained the defect I had was that your eyes have opposing nerves/ muscles on either side of your eye. When one muscle is weaker (palsy), the opposing muscle pulls the eye out of alignment. The solution is to weaken (cut) the stronger opposing muscle to gain equilibrium. Thankfully that did not happen for me. |
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Human vision has a lot of image correction built in. The clarity of our vision is truly a wonder, and the ability to recognize patterns and movement is incredible. It all happens seamlessly.
My optometrist was using the slit lamp to look around inside my eyeball, and I could see an image of the blood vessels in my retina. I guessed that it was a reflection off the inside of my cornea. He said, no, that is always present but the eye/optic nerve/brain system corrects for it. The bright light makes it visible. I knew a physicist who used a bright light to self diagnose and quantify his cataracts by using a bright light (a candle in his case) and observing the defect in the image he observed. |
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I have a similar problem which is age-related macular degeneration (which may have something to do with diabetes and renal problems). But, if you're noticing more, maybe you'd be wise to see a retinal specialist.
http://www.allaboutvision.com/conditions/amsler-grid.htm http://www.foreseehome.com/technology.html |