A new regulatory statement was issued concerning the eye lens radiation protection of persons in planned exposures. A debate was raised on the adequacy of the dosimetric quantity and on its method of measurement. The aim of this work was to establish the individual monitoring procedure with the EYE-D™ holder and a MCP-N LiF:Mg,Cu,P thermoluminescent chip detector for measuring the personal dose equivalent Hp(3) in workers of a Positron Emission Tomography Radiopharmaceutical Production Facility. •New regulatory statement was issued concerning eye lens radiation protection.•The calibration procedure of dosimeters for measuring Hp(3) was studied on a slab and cylindrical phantoms.•Hp(3) measurements in workers in a radiopharmaceutical production facility were done.