What causes floaters and are they dangerous or warning signs?

See an eye doc soon! Possible warning sign for retinal tearing, bleeding or detachment. See an eye doctor as soon as possible.
Vitreous detachment. Floaters are caused by the vitreous (jelly in the eye) detaching from the retina (typically a normal change in the aging eye). The vitreous clumps up or develops blurry areas within the jelly causing your floater. Yes they can be a warning sign. If when the vitreous changes, causing floaters, the retina is torn you are at risk for a retinal detachment. You should have and examination.