Display apparatus and display system

A display apparatus, comprising:

• an irradiation system that radiates light to a first region corresponding to a central visual field of a retina of at least one of both eyes of a user and at least a part of a second region outside the first region, wherein the second region includes a first peripheral visual field region corresponding to areas in which visual field areas of both eyes overlap each other and excluding the central visual field and a second peripheral visual field region corresponding to an inside of a visual field area of one of both eyes and an outside of a visual field area of the other eye, wherein the irradiation system radiates the light to the first peripheral visual field region and the second peripheral visual field region on the retina of one of both eyes, wherein a resolution of an image displayed by the light radiated to the second region is lower than a resolution of the image displayed by the light radiated to the first region, and wherein a resolution of the image displayed by the light radiated to the second peripheral visual field region is lower than a resolution of the image displayed by the light radiated to the first peripheral visual field region.