Erratum and addendum to “Transcranial stimulability of phosphenes by long lightning electromagnetic pulses” [Phys. Lett. A 374 (2010) 2932]
The comparison of electric fields transcranially induced by lightning discharges and by TMS brain stimulators via E→=-∂A→ is shown to be inappropriate. Corrected results with respect to evaluation of phosphene stimulability are presented. For average lightning parameters the correct induced electric fields appear more than an order of magnitude smaller. For typical ranges of stronger than average lightning currents, electric fields above the threshold for cortical phosphene stimulation can be induced only for short distances (order of meters), or in medium distances (order of 50 m) only for pulses shorter than established axon excitation periods. Stimulation of retinal phosphene perception has much lower threshold and appears most probable for lightning electromagnetic fields.