![SLIM_occhiali](https://www.mfisrl.com/wp-content/uploads/2019/04/SLIM_occhiali.jpg)
They are made of two solenoids put in plastic containers and mounted on glasses for medical use; the field is emitted on the two containers’ total surface. You select the emission with a control box that lets you to distribute the field over both eyes at the same time, or just one.