[en] The dose of radiation delivered to the crystalline lens of the eye during diagnostic X-ray examinations is significant, particularly in conventional neuroradiological procedures such as angiography and pneumoencephalography which involves large numbers of exposures. Experiments have therefore been devised to record the radiation level present in the vicinity of the eyeball during plain and contrast radiography of the skull. A description is given of the construction and performance of protective lead eyeshields designed for use during certain types of skull radiography. Measurements made during the examination of patients and with a phantom skull indicated that a ten-fold reduction in radiation dose to the eye could be achieved through their use during certain diagnostic procedures. (U.K.)