For four or five years, I have periodically experienced a curved, jagged-edged pulsating line
in my vision. The jagged areas are very geometric, and there is color (usually bright
pink or purple) that alternates with dark (maybe black) and white. (it's a very pretty display, but very disconcerting). It does not occur on a regular basis, but I have had it occur multiple times (probably more than 20, but less than 40 times).