Accession Number : ADA256951


Title :   Alterations in Morphology and ERG Spectral Sensitivity After Near IR (1064 nm) multiple Parafoveal Q-Switched Laser Exposure.


Descriptive Note : Final rept.,


Corporate Author : LETTERMAN ARMY INST OF RESEARCH PRESIDIO OF SAN FRANCISCO CA


Personal Author(s) : Zwick, H ; Reynolds, S B ; Lund, D J ; Schuschereba, S T ; Stuck, B E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256951.pdf


Report Date : Sep 1992


Pagination or Media Count : 29


Abstract : In this investigation we examined the effect of near-infrared intense macular laser exposure on the non-human primate focal ERG spectral sensitivity function. Five cynomologous monkeys were exposed to two parafoveal Q-switched Neodymium (1064 nm) lager pulses at approximately 4 millijoules Total Interocular Energy (TIE). Exposures varied in degree of overlap through the superior portion of the fovea. Focal ERG spectral sensitivity was measured in the foveal region using a synchronous detection technique. Alteration in the long wavelength region of the focal ERG spectral sensitivity function was observed in all animals. This alteration could indicate a dominant presence of the long wavelength primate cone system. The dominance may be the result of neural disinhibitory effects of damaged photoreceptors and the complications of retinal fibrosis on normal receptor activity and orientation as well as normal retinal receptor reparative functions. Spectral sensitivity, fovea, retinal fibrosis, reparative functions, photoreceptors.


Descriptors :   *Q SWITCHING , *EXPOSURE(GENERAL) , *RETINA , *LASERS , FUNCTIONS , SENSITIVITY , PULSES , OVERLAP , LONG WAVELENGTHS , FIBROSIS , ELECTRORETINOGRAPHY , PHOTORECEPTORS , MONKEYS , FOVEA , NEODYMIUM , PRIMATES , PHYSIOLOGY , ANIMALS , REGIONS , ENERGY , HUMANS , DETECTION


Subject Categories : Stress Physiology
      Lasers and Masers


Distribution Statement : APPROVED FOR PUBLIC RELEASE