There was an early form of red dot called occluded eye(?)

by Rob Leahy ⌂ @, Prescott, Arizona, Tuesday, February 04, 2014, 08:59 (3951 days ago) @ Slow Hand
edited by Rob Leahy, Tuesday, February 04, 2014, 11:22

that worked on this very principle.

--
Of the Troops & For the Troops


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