Posterior vitreous detachment is a common age-related change where the gel inside the eye separates from the retina. It often causes new floaters or flashes but is usually harmless once the retina is checked.
What happens during PVD
With age, the vitreous gel becomes more watery and shrinks slightly. It then peels away from the retina, pulling on it briefly and creating light flashes.
- People notice sudden cobwebs, dots, or strands in their vision.
- Flashes are more obvious in dim light or with eye movements.
- Symptoms are usually more marked in one eye at first.
- The process may take several weeks to settle fully.
- Floaters often become less intrusive as the brain adapts.
When to worry and seek help
Most PVDs do not threaten sight, but a small number cause retinal tears. Prompt assessment is essential whenever new floaters or flashes appear.
- Urgent review is needed if you notice a dark curtain, shadow, or sudden drop in vision.
- The ophthalmologist will examine the retina carefully, sometimes with pupil dilation.
- Retinal tears can often be sealed with quick laser treatment.
- Return promptly if symptoms change again after a normal examination.
- Regular checks are advised if you are very short-sighted or had previous retinal problems.
