i wouldnt worry to much about that, everytime i look in the sky, read with a white backround, or even now while im writing this i see squggly lines (some are bigger then others and some are black and some are see through). i went to the eye doctor less then a week ago and asked him because i was all freaked out, he told me that its perfectly normal and that you can get more as you get older. i first noticed them a few years ago but didnt get anxiety about them till i used google for what it could be.
not sure if thats what your talking about but if it is i hope this helps