The Electrophysiology/Perimetry Technician (EPPU Tech) works directly with the patient performing preliminary evaluations and a variety of diagnostic tests. These duties may consist of the measurement of visual acuity, lensometry, tonometry, pupil evaluation, anterior chamber depth measurement, instillation of eye medications, obtaining medical history, color vision testing, visual field testing, dark adaptation testing, electro-oculography and electroretinography. Data is presented to the staffing Ophthalmologist to determine diagnosis and treatment plans for the patient. Accuracy and applicability of the patient data gathered is the responsibility of the EPPU Tech. The EPPU Tech is expected to interact with patients, physicians and allied health staff.