f r- rabbits to a distance of 28.5 miles, however, the significance of this finding in its relation to human retinal burns awaits further laboratory investigation. 3. Protective Devices: Sout io & 42 wiles. A number of protective devices have been used. Experience at UPSHOT-KNOTHOLE demonstrated that if all wave lengths were screened out by adequate glasses except between 600 and 680 millimicrons, thcre was complete protection. CONCLUSIONS: 1 Burn owt f bo thre the filden. Flash blindness during daylight and night operations will not present an operational problem for ground troops, Daylight operations will not be impaired for air crews. Loss of visual acuity under nighttime conditions presents an operational hazard for unprotected air crews. Glasses similar to those used at UPSHOT-KNOTHOLE will give adequate protection for all . operational requirements. If the fireball is in the forward field of vision, retinal burns may be produced. RECOMMENDATIONS: PROJECT AGHICIES ’ AND PROJECT OFFICERS: Further laboratorywork is indicated te evaluate the findings in test animals in Operation UPSHOT~KNOTHOLE, Additional field tests are not required for human volunteer except to evaluate new types of protective filters. if EUSTER—JANGLE i: Nh School of Aviation Medicine TUMBLER~SNAPPER School of Aviation Medicine Army Medical Conter_ UPSHOT=KNOTHOLE School of Aviation Medicine OPERATION PAR= TICIPATION AND SUPPORT: REPORTS: | OPERATION PROJECT NO. BUSTER-JANGLE L&.3 TUMBLER--SNAPPER hed UPSHOT~KNOTHCLE LoS Ve Ae Byrnes, Col, MC, USAF oN VY. Ae Byrnes, Col, MC, USAR 1! R. Le. Forest, Maj, USA oN Ve de Byrnes, Col, NC, USAF AFSWP FUNDS OTHER 1. Wr-3h1, Project .3, BUSTER, "Flash Blindness", Oct-Nov '5} 2e WT~530, Project 4.5, SNAPFER, "Flash Blindness", Apr~June 1952 3. T~S6k, Operation SNAPPER, "Flash Blindness", Final Report to the Test Director, 1953 he UKP-36, Project eS, UPSHOT-KNOTHOLE, "Flash Blindness"

Select target paragraph3