Laser Eye Effects (1968) / Chapter Skim
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Preface and Recommendations
Preface and Recommendations
Pages 1-3
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2. It is highly possible that irreversible effects occur below the level of observable pathology, which may nevertheless be detectable by electron-microscopy or by enzyme stain techniques.
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Assuming a night-adapted pupil, these values are 1 X 10~6 joules per square centimeter in the plane of the cornea for the non-q-switched pulse and 1 X 10~7 joules per square centimeter at the cornea for the giant pulse. As a provisional safety standard, the Armyl has added an additional safety factor of 10 in promulgating these values as allowable safe corneal irradiance levels.
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As will be pointed out in Chapter Ml, the problems of flash blindness effects on the receptor mechanisms of the eye as produced by laser exposure are totally different. In addition, between the extremes of retinal burn on the one hand and levels which we know produce completely recoverable flash blindness on the other, lies an almost totally unexplored range which we estimate to be from I to 3 log units of irradiance over which more subtle damage to retinal tissue, particularly the receptor cells, may be encountered.
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