title: Role of A--scan ultrasonography in ocular media opacities.
mesh_terms: D000867:Anterior Chamber; D002386:Cataract / Q000175:diagnosis*; D002648:Child; D003318:Corneal Opacity / Q000175:diagnosis*; D005128:Eye Diseases / Q000175:diagnosis*; D005134:Eye Neoplasms / Q000175:diagnosis; D006801:Humans; D012175:Retinoblastoma / Q000175:diagnosis; D014463:Ultrasonography; D014822:Vitreous Body