A simple B-scan ultrasonoscope.
D003937:Diagnosis, Differential; D004582:Electronics, Medical / Q000295:instrumentation*; D005128:Eye Diseases / Q000175:diagnosis*; D006801:Humans; D009518:New York; D009885:Ophthalmology / Q000295:instrumentation*; D009915:Orbit; D014465:Ultrasonics / Q000295:instrumentation*; D014463:Ultrasonography