[en] Dynamic changes in corneal nerves caused by various types of radiation were studied in rabbits. The was irradiated using ophthalmic ⁹⁰Sr and ⁹⁰Y applicators and contact X-rays or from sources used for radiation therapy, i.e. X-rays (250 keV) and high energy gamma radiation (¹³⁷CS - 660 keV and ⁶⁰Co - 1.27 MeV). Dose distribution inside the eye was calculated or exposures used for local irradiation were measured in the target tissue by ionization chambers. After the contact application of beta radiation, incidence and intensity of changes were directly proportional to the amount of the absorbed dose. For a given value of the radiation dose the intensity increased with the time of latency. In high exposures the contact X-ray irradiation caused significant changes in the corneal stroma and disintegration of neural fibres. Results effected by high energy radiation are important for the study of the therapeutic application of ionizing radiation in medicine, occupational exposure of workers and exposure caused in extraordinary situations. The results of this study proved that changes in the corneal inervation caused by the above types of radiation are significant and sometimes irreversible. (author)