---
title: Posterior vitreous detachment (PVD)
description: "[Posterior vitreous detachment is a common age-related change](https://bluefinvision.com/blog/what-is-posterior-vitreous-detachment-pvd/) 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…"
url: "https://bluefinvision.com/knowledge-base/topics/conditions-diseases/posterior-vitreous-detachment-pvd/"
updated: "2026-01-22"
category: "Conditions & Diseases"
---

# Posterior vitreous detachment (PVD)

[Posterior vitreous detachment is a common age-related change](https://bluefinvision.com/blog/what-is-posterior-vitreous-detachment-pvd/) 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.