The invention relates to a device for eye monitoring, comprising an inspection glass (3) and a frame (2) that accommodates the inspection glass, wherein the inspection glass (3) is a planar optical waveguide (4) or comprises at least a planar optical waveguide (4), the planar optical waveguide (4) comprising at least one layer having luminescent particles. According to the invention, at least one photosensor (5) is arranged on the inspection glass (3) or the planar optical waveguide (4), said photosensor detecting the intensity of the luminescence light guided in the planar optical waveguide (4) and/or in the inspection glass (3) by means of total internal reflection (TIR).
