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Posterior vitreous detachment
Retina & Vitreous
Key Points
- •PVD is separation of the posterior vitreous cortex from the ILM - age-related, extremely common (>80% by age 80); Weiss ring is pathognomonic
- •~10–15% of symptomatic PVDs are complicated by retinal tears - dilated fundoscopy with scleral indentation is mandatory; Shafer sign (pigmented vitreous cells) indicates retinal tear
- •~70% of PVDs presenting with vitreous haemorrhage have an underlying retinal tear - urgent B-scan if no fundus view
- •Retinal tears are treated with barrage laser or cryopexy (~95% success in preventing RD); retinal tears can develop up to 6 weeks post-PVD - follow-up essential
- •Fellow eye risk: PVD develops in ~65% within 2 years; ~10% risk of retinal tear
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Keep reading Posterior vitreous detachment
17 more sections are included with the Clinical plan.
- Definition
- Epidemiology
- Aetiology and causes
- Pathogenesis
- Classification
- Risk factors and associations