Microperimetry, sometimes called fundus related perimetry, is a type of visual field test which uses one of several technologies to create a "retinal sensitivity map" of the quantity of light perceived in specific parts of the retina.Visual field testing is widely used to monitor pathologies affecting the periphery of vision such as glaucoma. During a conventional test, patients are asked to look steady (fixate) at a visual target, while light stimuli are projected at varying intensities in different retinal locations. This process is not, however, considered accurate in the evaluation of pathologies affecting the central part of the retina. Patients with these pathologies are often unable to fixate reliably. By contrast, fundus perimetry, produces reliable results even in patients with unstable fixation, or advance macular degeneration. It combines fundus imaging, retinal sensitivity mapping and fixation analysis in one examination and has been used over a decade as a powerful tool to detect, describe and follow-up pathologies affecting the macular area.
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