What Are Some of the Causes of Clear Squiggly Lines in Vision?

Clear squiggly lines are a type of eye floater, and their most common cause involves collagen, which are small flecks of protein, according to WebMD. The collagen comes from the back compartment of the eye, where it breaks off and floats into the line of vision. Most eye floaters are not dangerous.

Most eye floaters occur in people between the ages of 50 and 75, as WebMD reports. In addition to protein, it is possible but rare for eye floaters to appear due to eye disease or injury, eye tumors, and diabetic retinopathy. It is also rare but possible for floaters to appear due to retinal tears or detachment, bleeding in the eye and certain types of infection. People who have migraines may also see floaters.