A Weiss ring is a type of eye floater made from pieces of debris that float around the vitreous of the eye. Weiss rings are shaped like a circle or oval and can be large enough to obstruct fields of vision.  A Weiss ring floater is a sign of posterior vitreous detachment (PVD), a common condition that occurs with age. If you suspect you have Weiss ring floaters, make an appointment to see an ophthalmologist.