User blog comment:Erosfan222/Really Important Question!!!/@comment-9893940-20130612153441

they could be 'floaters', little tiny specks of miscellaneous debris caught in the film on the eye. these are quite natural and happen to everybody. another possible explanation is phosphene, more commonly known as the-light-that-shows-up-when-you-close-your-eyes-and-shine-a-light-on-your-eyelids. your description, however, sounds like something i once saw in a 'supernatural' photograph, showing what the claimed to be 'ectoplasm trails'. these streaks of light (generally green) were attributed to a number of factors, like distortion or 'linear lens flares'. these photos, however, are largely regarded as a hoax. As for personal experience, i've seen things somewhat like you described, but not with similar frequency of occurence. these lights were caused by refraction and an effect similar to a mirage.