B-scan ultrasonography is MOST useful for clinical evaluation in which of the following scenarios?
- A Assessment of corneal endothelial cell density
- B Evaluation of retina in a patient with dense vitreous haemorrhage preventing fundus view ✓
- C Measurement of corneal topography for keratoconus diagnosis
- D Documenting RNFL thickness in glaucoma follow-up
Correct answer: B. Evaluation of retina in a patient with dense vitreous haemorrhage preventing fundus view
Explanation
B-scan ultrasonography (10 MHz probe) provides cross-sectional imaging of the posterior segment and is indispensable when the fundus cannot be visualized due to media opacities such as dense vitreous haemorrhage, dense cataract, or corneal oedema. It can detect retinal detachment, choroidal detachment, intraocular foreign body, and tumours behind opaque media. Endothelial cell density requires specular microscopy; corneal topography uses Placido-disc or Scheimpflug imaging; RNFL thickness is measured by OCT.
Reference: Khurana Comprehensive Ophthalmology, 7th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.