This could reprsent a visual migraine without the headache. I suggest you see an ophthalmolgist for a complete exam. A retinal tear or detachment or a posterior vitreous detachment can cause flashes of light but they are usually sporadic flashes often brought on by movement of the eye.
I noticed that when I am either stressed out or having a bad sinus attack is when I will see those strange lights in one of my eyes. Never both of them. Just the one. Today, my left eye had this "photo flash" light on and off through out the day. It kinda made me nervous. I did have an MRI (without contrast) for my sinuses. If there was anything serious they would have noticed (serious such as tumor, etc)?
If I have a retinal tear how is that treated? Actually, how does a person tear it to begin with?
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