Accession Number : AD0689483

Title :   HELIUM NEON LASER EFFECTS ON THE EYE.

Descriptive Note : Annual rept. 1 Aug 68-31 Mar 69,

Corporate Author : EG AND G INC LOS ANGELES CALIF SANTA MONICA DIV

Personal Author(s) : Davis,Thomas P. ; Mautner,William J.

Report Date : 02 APR 1969

Pagination or Media Count : 64

Abstract : The objective of this program was an investigation of the effects of helium-neon laser radiation on the eye. All exposures were of 10 second duration, and the ophthalmoscopically visible retinal lesion was selected as the injury criterion. Median effective powers were established for retinal exposure spot diameters of 100, 260, and 800 micrometers. Injury was assessed immediately, and at 10 minutes, 1 hour, and 1 day post-exposure. An analytical prediction of the relationship between median effective power and spot size was also tested. The sensitivity ratio was not constant, but depended on spot size. Median effective powers increased with increasing spot size, as expected, but the increase was not as great as that predicted analytically. It was concluded that a thorough study of the analytical prediction of injury is needed to resolve this discrepancy. The need for a damage criterion based on functional injury was also recognized. (Author)

Descriptors :   (*COHERENT RADIATION, EYE), (*GAS LASERS, HAZARDS), (*EYE, WOUNDS AND INJURIES), RADIATION EFFECTS, RETINA, HELIUM, NEON, EXPOSURE(PHYSIOLOGY), BURNS(INJURIES), DOSAGE, RESPONSE(BIOLOGY), SAFETY

Subject Categories : Medicine and Medical Research
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE