Fig. 2. Calcium transients in retinal glial cells.

Calcium fluorescence is measured simultaneously in seven Müller cells at the vitreal surface of the retina. The light-stimulus protocol, a 16-second episode of flickering light superimposed on a dim background light, is illustrated at the bottom. Calcium transients are generated in each of the Müller cells. On average, Ca²⁺ transients occur at a higher rate during the flickering stimulus than during the dim background illumination. Unpublished results.