Abstract
The objective data provided by the electrophysiological assessment of retinal function are fundamental to the accurate diagnosis and appropriate management of patients with genetically determined retinal disease. In some disorders, the abnormalities visible upon ophthalmoscopy may suggest the diagnosis when taken in clinical context. An example of that is the group of disorders collectively known as retinitis pigmentosa (RP), in which there is intraretinal bone-spicule pigment deposition consequent upon photoreceptor cell death. However, the extent and severity of the fundus appearance may correlate poorly with the results of objective electroretinographic examination, and the latter greatly facilitates counselling in relation to prognosis. Equally, there are some disorders, such as “cone dystrophy with supernormal rod ERG”, related to mutation in KCNV2, where the diagnosis is made by the pathognomonic electrophysiological features. Furthermore, those disorders where the site of dysfunction is primarily inner retinal may be associated with a normal fundus appearance.
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Holder, G.E. (2014). Electrophysiological Testing. In: Puech, B., De Laey, JJ., Holder, G. (eds) Inherited Chorioretinal Dystrophies. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69466-3_2
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