I get flashes or lightening in the eye. What could it be due to?

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This is the age where you get posterior vitreous detachment. It is a naturally occurring age-related phenomenon where the vitreous jelly separates from one's retina and in this process, one might experience a ring-like floater and probably some flashes. Some warning signs you can watch out if there is something abnormal. Many floaters instead of one. Size of floater increases suddenly. A significant decrease in vision. Too many flashes. If these occur, please consult a vitreoretinal expert ophthalmologist for a dilated fundus examination to rule out any areas of weakness in the retina. Till then, start Nepafenac eye drops once at bedtime to hasten the PVD process (posterior vitreous detachment).