If the results of any of these
tests signal that disease may be present, we will recommend
additional diagnostic tests and
procedures, including X-ray or ultrasound studies and biopsies of suspected abnormal organs or growths.
Additional diagnostic procedures may include electroretinography (ERG), gonioscopy, ocular ultrasonography, tear film break - up times, blood pressure measurements, neuro - ophthalmic
testing, nasolacrimal duct cannulation and irrigation.