A B-scan ultrasound of the eye shows a highly reflective, acoustically dense membrane with after-movement ('on-movement') on dynamic scan. This finding is most consistent with which diagnosis?
- A Rhegmatogenous retinal detachment ✓
- B Posterior vitreous detachment
- C Choroidal detachment
- D Vitreous haemorrhage
Correct answer: A. Rhegmatogenous retinal detachment
Explanation
Rhegmatogenous retinal detachment on B-scan appears as a highly reflective membrane (since retina is a firm tissue) that shows 'on-movement' — the detached retina continues to undulate briefly after the eye stops moving (after-movement). PVD shows a low-reflective mobile membrane. Choroidal detachment has a convex, dome-shaped, immobile membrane of moderate reflectivity. Vitreous haemorrhage shows low-reflective mobile opacities without a defined membrane.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.