MediGlasses for fMRI. MR safe prescription glasses suitable for use in MRI, fMRI, MEG, PET, CT and EEG environments. No metallic components. Easy push fit interchange system with -6 to +6 dioptre Rx/lenses in 0.5 dioptre increments. Sleek and safe glasses for viewing during studies where metallic glasses would be unsafe or cause data artefacts. These all-plastic glasses come with a comfortable adjustable head strap and face/nose padding for supreme comfort. No previous optical knowledge is necessary for clear, quick, and safe patient/subject vision correction.