Accession Number:

AD0659146

Title:

RESEARCH ON OCULAR EFFECTS PRODUCED BY THERMAL RADIATION

Descriptive Note:

Final rept. Jul 1966-Jun 1967

Corporate Author:

TECHNOLOGY INC SAN ANTONIO TX LIFE SCIENCES DIV

Report Date:

1967-07-01

Pagination or Media Count:

158.0

Abstract:

Chorioretinal burn thresholds for rabbits were determined for 66 various combinations of exposure durations and retinal image diameters. The criterion for burn damage was the appearance of an ophthalmoscopically visible lesion 5 minutes after the flash exposure. Exposure durations ranged from 165 microsec to 100 sec and the range of image diameters was from 0.053 mm to 1.08 mm. The thresholds were based on an average of 9 eyes per condition. Burn thresholds were also determined for rhesus monkeys. Exposure durations from 4 to 250 msec and image diameters from 0.11 to 1.30 mm were employed for the threshold determinations. Fluorescein angiographs were investigated as a means for the detection of chorioretinal damage below the level of the ophthalmoscopically visible lesion. In an area of moderate damage there is rapid fluorescence which was interpreted to be the result of an increase in capillary permeability. A ruby laser was adapted for further studies on chorioretinal burns in rabbits and primates. And a flashblindness testing apparatus for measuring visual recovery times for human subjects was constructed and tested.

Subject Categories:

  • Anatomy and Physiology
  • Medicine and Medical Research
  • Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE