ia
mm An air burst of this size at dawn of a clear day (93 percent
atmospheric transmission) is sufficient to produce chorioretinal burns
at wa monkeys and rabbits ondNM 02 man,
At this
yield and these distances the energy of the first 50 ms of the
ys
detonation, and particularly that of the first pulse alone a,
is of little significance in the production of burns,
The highest
incidence of burning occurred in those animals whose eye exposure
included the period from 60 through 200 ms.
There is limited evidence that burns could be produced at somewhat
greater distances under identical conlitions of exposure at the Pacific
Proving Grounds.
It is believed, however, that chorioretinal burning
assumes its greatest significance for the pilot and air crews at high
altitudes where specific absorption effects by salt water spray and
excessive humidity are not factors of atmospheric attenuation,
Adiditional
information is needed on the spectrum of the atomic flash in order to
predict the distances at which burning is significant.
The rate of delivery of thermal energy is of prime importance in
the production of chorioretinal burns.
At near~threshold distances, filters of the colors and densities
tested will prevent chorioretinal burns; at intermediate distances
4
pire
these filters will reduce the incidence and severity of the lesions,
LTE
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