Electroretinographic evaluation of ocular complications following radiation therapy

An electroretinographic study has been performed, as a measure of retinal function, in a series of 60 patients who received telecobalt radiotherapy for tumours that involved the orbit or adjacent structures. Beside electroretinogram [ERG] recording, patients were subjected to complete ophthalmological examination before, immediately after and 6 months following treatment. In all the cases, ERGs. showed hyperactive responses immediately after irradiation but returned to the pre-irradiation levels within 6 months after treatment