Self Luminous Eyes

That the fundi of the eyes are self luminous was first discovered, according to Invention, by Helmholtz, who claimed to see the movement of his arm in the dark by the light of his own eyes: hence perhaps the glow of some animals’ eyes in the dark. The case of Helmholtz is, however, peculiar, and probably few men have the faculty so well developed. Capsume, the little slave boy whom Gordon rescued and brought from the Sudan, used to say that Gordon could see in the dark, because “the light was in his eyes.” In Mr. Tesla’s opinion it is men of uncommon imaginative power and mental activity who are most likely to possess this power, which he calls “fluorescence of brain action.”