Accession Number : AD0786446

Title :   Threshold Damage Evaluation of Long-Term Exposures to Argon Laser Radiation.

Descriptive Note : Final rept. Sep 73-May 74,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : Gibbons,William D.

Report Date : AUG 1974

Pagination or Media Count : 15

Abstract : The maculae of rhesus monkeys were exposed to an argon-ion laser operated in the TEMoo continuous wave (CW) mode at a wavelength of 514.5 nm. Damage thresholds (ED50) were determined for exposure times of 0.5, 5, 30, and 120 sec. Retinal damage was assessed at both 1-hr and 24-hr postexposure. With increasing exposure times, a 24-hr threshold criterion resulted in significantly lower threshold values, compared to a 1-hr criterion. Threshold values of 0.5 sec using 1-hr and 24-hr evaluation criteria were determined to be 9.4 and 9.0 mW, respectively; for 5 sec, 6.4 and 5.6 mW; for 30 sec, 5.4 and 2.5 mW; and for 120 sec, 4.4 and 0.54 nW. (Author)

Descriptors :   *Argon lasers, *Radiation effects, *Retina, Eye, Radiation hazards, Damage, Radiation dosage, Thresholds(Physiology), Monkeys, Experimental data

Subject Categories : Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE