X-ray vision.
Recent correspondence initiated by Dr. Cochrane Shanks' account of the sensation of light experienced during a CAT scan recalls an article on vision by X rays by R. R. Newell (1948).
CAT stimulation of retina
I recently underwent an Emiscan (fortunately negative) at the skilled hands of Professor George du Boulay, and it confirmed an observation that I made in 1922, that the retina can be stimulated by X rays.
Measurement of the Diameters of the Living Eye by Means of X-Rays
SEVERAL of the pioneer workers in röntgenology—Röntgen included—recorded the fact that X-rays are perceived by the dark-adapted eye. Similar observations were made on radium rays, which were even held to surpass ordinary light as a source of illumination to the partially blind:radium rays were in fact used by one observer1 for teaching at a blind school. Conflicting reports rapidly led to loss of all interest in the matter, until Taft2 in 1932 clearly established the visibility of X-rays, and Pirie3 simultaneously and independently directed attention to the possibility of ‘reading with closed eyes’ by means of X-ray light.