Proceedings of the U.S. Army Natick Laboratories Flash Blindness Symposium
John M. Davies, David I. Randolph · 1967
1967 Army research on flash blindness shows government agencies have long studied electromagnetic energy's biological effects.
Plain English Summary
This 1967 US Army symposium examined flash blindness, a temporary vision impairment caused by intense light exposure. Researchers studied visual performance recovery in both cats and humans using electroretinography and behavioral testing. The research focused on understanding how bright flashes affect vision and how quickly normal sight returns.
Why This Matters
Flash blindness research from the 1960s reveals important parallels to modern EMF health concerns. Just as the military studied how intense light could temporarily disable vision, we now face questions about how electromagnetic radiation affects our sensory systems and neural function. The Army's systematic approach to documenting biological effects from energy exposure mirrors what independent researchers advocate for today with radiofrequency radiation. This symposium demonstrates that government agencies have long understood the need to study how various forms of electromagnetic energy interact with human biology. What's particularly relevant is the focus on recovery time and behavioral impacts, concepts that apply directly to current debates about EMF exposure from wireless devices affecting sleep, cognition, and sensory processing.
Exposure Information
Specific exposure levels were not quantified in this study.
Study Details
The purpose of the present paper is to present the results of two studies of the recovery times of cats. The first will be a report of an operant conditioning technique and the second will consist of the results obtained by electroretinography.
Two studies were conducted: 1) Operant conditioning technique using a 45 cm cubical plexiglas box wi...
Behavioral recovery times showed that cats D and M had similar recovery times while cat W showed con...
1. The production of flash blindness in cats is largely dependent upon the wavelength of the adapting flash. 2. Maximum visual impairment occurs when the adapting flash is either blue or blue-green, regardless of the ERG stimulus wavelength. 3. Blue and green stimuli were up to 65 times more effective in producing flash blindness than red, yellow, white and green adapting flashes. 4. No differences were found between the wavelengths of the ERG stimuli used to measure the recovery time of the cat.
Show BibTeX
@article{proceedings_of_the_u_s_army_natick_laboratories_flash_blindness_symposium_g4783,
author = {John M. Davies and David I. Randolph},
title = {Proceedings of the U.S. Army Natick Laboratories Flash Blindness Symposium},
year = {1967},
}