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Approved For Release 200300 HFIP : CIA-RDP96-00788R001300020001-6 ST-CS-01-169-72 July 1972 reports from US Air Force personnel also describe the use of bright red strobe lights that pulsate so rapidly that it almost gave a stop-motion appearance that one of the Soviet's aircraft engines was feathered. It might be concluded that, at least to the Soviets, color is a very important consideration. 4. (S/CD/NDA) The following information is based on a discussion SG1B by Cd : Canadian scientists who are long standing psycho-optic researchers of the highest rank and who also are oriented towards their military establishments are Doctor Douglas Pearce and Doctor C.E. Mackinnon. The two doctors have specialized in psycho-optic research dating back to the early 1950s. About 1962, they became associated with the Canadian Ministry of Defense in Toronto, Canada. Doctor Pearce and Doctor Mackinnon have been experimenting with human subjects since 1952. Some of their work includes studies on the effects of light and other stimuli on aircraft pilots; it is believed that this research was military oriented. It is felt that their work (and future werk) should be studied and watched because of their expertise in the area of light stimuli. 5. (S/CD/NDA) Very little. literature has appeared on counter- measures or defense against flashing lights. One US expert (246) suggests that perhaps the most simple means of protecting against the adverse effects of flickering light would be a series of filters fitted to eye glasses or goggles, but the wearer would have to be absolutely cognizant of the exact wavelength employed against him to get the desired results. A variable and selective filter for eye glasses could be manufactured. Also, there is optical glass that would limit the field of vision to a few degrees. Based on the discussion of the use of a tungsten light to conceal a laser source, it would be of interest to see if any discemable eye damage had occurred to any of the air crew that was subjected to Soviet red strobe lights. It appears to be imperative that eye examinations must be given to all personnel who report exposure to Soviet flickering lights. \ 86 CONTROLLED DISSEMINATION NO DISSEMINATION ABROAD NO FOREIGN DISSEMINATION