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It is likely that you are experiencing the flashing and floaters due to posterior vitreous
detachment (PVD). It is common with age, and usually not harmful, unless it becomes severe and effects you vision significantly. At that point the retina eye doctor could decide to remove the melted vitreous that is causing the PVD. In general, what happens is that with age the clear gel inside the eye sometimes melt in pockets at different locations, and sometimes the area of the melted vitreous detach from the back of the eye - and this is what causes the floaters and flashes
. However, retina detachment can cause flashes and floaters, but often more severe. So, while this is likely a PVD, I would suggest that you plan a visit to eye doctor for a complete dilated eye examination to exclude any other problem.
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Please note that this answer is for information only. It cannot be substituted for the visit to or the recommendation of your doctor.