Immediate Retinal Response to X-Rays at Milliroentgen Levels

Abstract

tion. In recent years it has been shown that X-rays are capable of producing an electroretinogram (ERG) in vertebrates. The present paper attempts to establish the lower limits of X-ray stimulation to which the retina of the frog will respond to produce an ERG. Up to the present time, three sets of records showing ERG's in response to X-rays have appeared in the literature. However, it appears that none of these records approaches the lower limits of X-ray dose required to produce responses to X-rays, although an attempt on the part of the authors was apparently