Just recently I have what I call my bottle cap show up. It is a bright light in the shape of a bottle cap. It sometimes has a rainbow hue. Mostly bright. moves from right to left and then goes away. Jagged edges are rainbow colored. I have had 20/20 until I turned 40. I wear readers but this has happened 3 times. usually at night but today it happened at work. I have been in under a lot of stress. A friend said he gets the same symptoms before a migraine. I don t get headaches. never have. My mom has been recently diagnosed with macular degeneration. Wondering if I should be seeking preventative measures or do I need a vacation?