Posterior vitreous detachment PVD happens when the gel in the back of the eye separates from the retina. It is a common age-related change and usually harmless, but can sometimes lead to retinal tears.
Symptoms
PVD often occurs suddenly and is more noticeable in one eye at first.
- New floaters, cobwebs, or a ring-shaped shadow in vision
- Flashes of light, especially in dim conditions
- Mild blur or a sense of something drifting across the eye
- Symptoms often settle over weeks as the brain adapts
Assessment and management
Any new floaters or flashes need prompt dilated examination to rule out tears or detachment.
- Retinal checks at presentation and sometimes follow-up visits
- No treatment needed for uncomplicated PVD
- Laser or surgery if a tear or detachment is found
- Urgent review if a curtain or shadow appears in peripheral vision
