I often see flashing light in my eye . But the really odd thing is that i can see the intricate pattern of my arteries in my eye. This usually occurs with heavy heart beats and is in rythm with pulse. Or it also occurs if i am running and taking impact on knees and would occur whenever i take impact. i can only see arteries in lower section of my eye only. The arteries look red with black outline
Recently, my eyesight weakened slightly. My optician thought i might have diabetes, which i dont.
Does anyone know why i could see arteries in my eyes?