ENT doctors use a variety of methods to diagnose ear conditions, including lighted otoscopic tools, symptom-related testing and more technically advanced methods such as tympanometry (measuring the movement of the eardrum) and acoustic reflectometry (measuring sound reflecting back to the eardrum) among myriad other measures. Evaluations may require examination of your ears, throat and nasal passage with an otoscope, physical examination of your head, neck and face as well and otoscopic inspection, in which your doctor will carefully move the scope in different directions to see the inside of the ear and eardrum. Meanwhile, some ear conditions may require a CT scan or audiologic tests to properly diagnose.