Posterior vitreous detachment

Case contributed by Bruno Di Muzio
Diagnosis almost certain


Previous vitreous hemorrhage.

Patient Data

Age: 55 years
Gender: Female

US Eye


There is a linear echogenic membrane in the posterior compartment of the left eye that is partially mobile and crosses the intersection of the optic nerve. Some floating echoes in the vitreous chamber would be in keeping with resolving hemorrhage in this setting. 

Case Discussion

Posterior vitreous detachment (or hyaloid detachment) occurs when the retinal layer and vitreous body/posterior hyaloid membrane dissociate, with an intervening fluid collection forming in the sub hyaloid space.

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