Clinical practice of microperimetry

Microperimetry is a new technique for evaluating visual function. It is used as a non-invasive method to analyze retinal sensitivity, fixing position and stability in different areas of macular fovea and parafovea. Compared with standard automated perimetry, microperimetry offers several unique features. It simultaneously images the fundus, incorporates an eye-tracking system to correct the stimulus location for fixation loss, and identifies any preferred retinal loci. Microperimetry is currently the clinical investigation of choice to assess residual visual functions and functional vision in macular degenerative diseases, especially geographic atrophy. There is an increasing popularity to employ microperimetry in clinical trials investigating new treatments for geographic atrophy, as well as other macular degenerative diseases, as a reliable functional outcome measure. (Int Rev Ophthalmol, 2019, 43: 210-216) Key words: microperimetry; retinal sensitivity; fixation stability; preferred retinal locus