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Simultaneous imaging of light-evoked activities in retinal photoreceptors and inner neurons

Simultaneous imaging of different retinal neurons functioning together can benefit better understanding of visual signal processing mechanisms. In this paper we demonstrate that intrinsic optical signal (IOS) imaging allows simultaneous monitoring of stimulus-evoked responses propagating from the photoreceptors to inner retinal neurons. High resolution imaging revealed robust IOSs at the photoreceptor, inner plexiform and ganglion cell layers. While IOSs of the photoreceptor layer were mainly confined to the area directly stimulated by the visible light; IOSs of inner retinal layers spread from the stimulus site into relatively large areas.