Floating worms that look like black or light colored lines moving in your vision are termed eye floaters. Up to 50 % of the human population ultimately develops eye floaters, and most of the time this is a harmless problem.

Modern Medical Theories About Floaters

The dots and lines floating around your eyes are actually due to a substance called vitreous, which is a gel that fills up the posterior part of your eye and separates from its connection to the retina to cause your symptoms. A web of dark shadows and strings that drift throughout your eyes are common and due to the vitreous gel getting older and liquifying/shrinking.

Different sized black floaters in front of your eyes are generated as the vitreous separates from the back wall of the eye. What looks like blobs on the end of a string in your eye are a manifestation of clumps of cells or debris floating through the vitreous gel.

Black floaters which look like smoke can give a shadowy appearance to things as they slowly settle within the gel like portion of your eye called the vitreous.

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