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These bright flashing zig zag lines that only last a brief bit might be from vitreous strands pulling on your retina....a different source of eye flashes then ocular migraines.
Here is some general information on this issue:
You have a thick gel material in the middle of your eyes called the vitreous. Over time as it liquefies, this gel material collapses on itself, forms little clumps that you can see as dots, lines or bugs. As these clumps form the vitreous pulls away from the wall of the eye. In the process it can stimulate the retina -- causing the flashes that you may see. It is recommended that you see your ophthalmologist to look at the retina to make sure there are no problems such as a retinal hole or tear. In most cases, there are no problems, but this exam is precautionary and allows for preventative treatment of any lesions that are found. If you notice a sudden increase in floaters, flashes of light (like a lightning storm), or a shadow/veil in the periphery of your vision, this can be worrisome for a retinal detachment. You would need to contact your ophthalmologist promptly in that case.
This would explain why you are only seeing this in one eye now.
Does this make sense to you?
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I see that you are offline. I'll switch over to the Q&A system. This system works a lot like 'text messaging' but an email is sent to each of us anytime something is posted to this thread. We can continue to work on your question there..... :)
I am sorry I was taking care of my daughter so if (((If you notice a sudden increase in floaters, flashes of light (like a lightning storm), or a shadow/veil in the periphery of your vision, this can be worrisome for a retinal detachment))) happens will it keep on or be intermitant like I am having just a minute or two at a time
you said I might expect to see these flashes off and on for short periods of time Which flashes are you speakin g of the ones I do not have to worry about or the ones about the retinal detachment