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An electroretinogram (ERG) test performed in 2014. A historical photo of a patient undergoing an electroretinogram. Clinically used mainly by ophthalmologists the electroretinogram (ERG) is used for the diagnosis of various retinal diseases.
Multifocal techniques are used in electroretinogram and visual evoked potential recordings to separate the responses originating from the stimulation of different locations in the visual field (and thus different retinal locations).
Hetling is an expert on the electrophysiology of vision, with accomplishments in retinal prosthesis and electrical stimulation therapy for retinal disease, leading to invited book chapters in leading Neural Engineering textbooks [2] [3] and earning the Excellence in Neural Engineering Award early in his academic career.
Acute zonal occult outer retinopathy (AZOOR) is an inflammatory retinopathy in the category of white dot syndromes typified by acute loss of one or more zones of outer retinal function associated with photopsia, minimal funduscopic changes and abnormal electroretinography findings.
Electrooculography (EOG) is a technique for measuring the corneo-retinal standing potential that exists between the front and the back of the human eye.The resulting signal is called the electrooculogram.
When electrical recordings are made from the skin, it is considered to be an ECG as described above.However, electrical recordings made from within the heart such as with an artificial cardiac pacemaker or during an electrophysiology study, the signals recorded are considered an "electrogram" instead of an ECG.
The Heidelberg Retinal Tomography is a diagnostic procedure used in ophthalmology.The Heidelberg Retina Tomograph (HRT) is an ophthalmological confocal point scanning laser ophthalmoscope [1] for examining the cornea and certain areas of the retina using different diagnostic modules (HRT retina, HRT cornea, HRT glaucoma).
Clinical neurophysiology, is a broader field that includes EEG, intraoperative monitoring, nerve conduction studies, EMG and evoked potentials. [10] The American Board of Psychiatry and Neurology provides certification examination in clinical neurophysiology.