PVD: The vitreous jelly in the posterior chamber of the eye can detach from the retina, usually without incident. Rarely, a retinal tear and retinal detachment can occur. The mechanical tugging of connective tissue of the vitreous on the retina makes the patient see flashes of light. As the vitreous separates from the retina, the connective tissue can float in front of your visual axis as "floaters.".
Answered 12/8/2018
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PVD is not a tear: A PVD or posterior vitreous detachment is a natural consequence of aging. When it occurs in someone suddenly and there are new floaters or flashes of light, we recommend a dilated exam of the retina. It is not because the floaters or flashes are dangerous, but because the PVD may also occur with retinal tears which can lead to retinal detachment, but it is possible to have PVD and no tear.
Answered 10/28/2016
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