Age and inflammation
can commonly casuse the gel-like fluid (vitreous) in the eye
to liquefy and detach leading to loose floaters
More than 50% of 80 year olds will have a vitreous detachment. 40 % of people with posterior vitreous detachments who also experience light flashes can have a 15% chance of developing a retinal tear. Therefore see an opthalomologist immediately.