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@lobbyandlab At best for lowering phosphene excitation threshold; tDCS/tACS is very crude, and there have been reports that induced phosphenes may be merely of a retinal origin https://t.co/Um3WtU33FI
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2) Phosphenes sometimes occur with alternating current stimulation, but are most likely retinal, not cortical. e.g. https://t.co/UTG6NLUX0k
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@leoschilbach Not so much the visual cortex as the retina: http://t.co/04SvrzlMlR and http://t.co/ZJJfhwoGSZ and http://t.co/NIcOq4FvKQ