Comparison of personal eye lenses monitors

A significant reduction in the annual limit from 150 mSv to 20 mSv in the exposure of workers' lenses to sources of ionizing radiation has raised the need for increased sensitivity and refinement of measurement by personal monitors. One of the first known systems is the EYE-D model, which was designed for OSAMED project monitoring for intervention radiology workers. This personal dosimeter consists of two TLD MCP-7, which are placed into capsules with a wall thickness equivalent to 3 mm soft tissue. Each capsule is pressed in contact with the cheek bone at the right and the other at the left eye corner. Studies by ORAMED and other authors have also highlighted possible limitations on the use of the EYE-D model, given its directional impact on the eye's impact from larger angles and when used in radiation fields other than X-rays or gamma rays. (authors)