hp oot 7 (NAVATO) Project 4.1 - Piomedical Effects - Choriorsctinal Burns - Colonel R. S, Fixctt onrerives The primary objective of this project is to obtain informtion on the requirements for protection of the eves azainst chorioretinal turns from atomic detconatiags cf varicus yields; in this case, an Oy Corollary technical objectives at the sam: yield are to: Determine whether blink reflexes will prevent chorioretinal burns. Ascertain which portions of the timeo-intensity pulse can produce thermil injury to the retina and choroid of the eye. Determine the time required fer blink reflex (B27) in rabbits and monkeys exposed to the extreme lizht intensity cf the atomic detonation. “xplore the feasibility of oculer protection by means of fixed density optical filters and/or combinaticns of filters. Test, under field contitions, protective shutter devices which are in the developmental stage and which are designed to close much more rapidly than the BRT. INSTUMENTATION The instrumentat that used on the shutter taitye. employed during this event is identical to (ZUNI) with the exception of some changes in alorimetric instrumentation, identical to that used (MONAWK), was also utilized. The main exposure facility was loc#ted on Bikini (How) (site 411.92) at 19.6 statue miles from the detonation, Ten additional rabbits without filter or shutter protection corre!oot * Rae \$ ty 5(