circa 1955: A man using an Ophthalmograph to record the movement of his eyes as he reads at the New York University Testing and Advisement Centre. (Photo by Carsten/Three Lions/Getty Images)
circa 1955: A man using an Ophthalmograph to record the movement of his eyes as he reads at the New York University Testing and Advisement Centre. (Photo by Carsten/Three Lions/Getty Images)