Which Diagnostic Technique Is Used to Confirm the Location and Extent

Multiple Choice

Which diagnostic technique is used to confirm the location and extent of cataracts?

A) Visually inspecting the optic fundus using an ophthalmoscope
B) Using tonometry to indirectly measure intraocular pressure
C) Revealing a dark area instead of the red reflex through ophthalmoscopy
D) Identifying patient history consistent with risk of cataracts and examining the eye to diagnose the cataract