What is the difference between fundus photography and visual electrophysiology?

Clinical visual electrophysiology examination technology uses the measurement of bioelectrical changes in the process of vision formation as observation indicators. It can reflect the functional status of the visual system at different levels from different angles and is non-invasive, objective and quantitative. It has the characteristics of reliability and repeatability, and plays an important role in the diagnosis and differential diagnosis of ophthalmic diseases, the evaluation of disease prognosis and efficacy, and the objective assessment of visual function. It is not only suitable for general patients, but also for patients who cannot undergo psychophysical examination, such as infants, young children, people with mental retardation or pseudo-blind people; in addition, it can overcome the obstacle of opacity for those with refractive interstitial opacity and unable to see the fundus. , to measure visual function, such as cataracts and vitreous opacity.

An important function of the fundus camera is to perform continuous fluorescein angiography on the fundus. This function can completely and systematically record the dynamic images of fundus circulation; clearly show the structure and shape of the microcirculation of the fundus, Identifying functional and organic changes in fundus blood vessels and tissues is helpful in clinical diagnosis of hypertension, diabetes, retinal vascular occlusion, fundus hemangioma, blood vessel rupture and leakage, etc.