Mary, I had the exact same experience when 2, 3 and 4 years old. I was
born totally blind and had eye surgery 7 times by age 7, each time, they
used ether and the first few times, I saw the lights that you describe and
did not know what they were, but they scared me. My first visual memory
was waking up in my Uncle, the doctor's house, and seeing a skylight and
screaming as I had not seen before and did not know what was happening. I
was, I think, 4.