Imaging optical unit for generating a virtual image of an initial image represented on an image generator , comprising: - at least one spectacle lens to be worn in front of the eye, said spectacle lens having an inner surface that is to face the eye and an outer surface that is to face away from the eye, - an input coupling device for coupling an imaging beam path emanating from the initial image in between the inner surface and the outer surface of the spectacle lens , and - a Fresnel structure present in the spectacle lens and serving for coupling the imaging beam path out from the spectacle lens in the direction of the eye, wherein the input coupling device couples the imaging beam path in between the inner surface and the outer surface of the spectacle lens in such a way that it is guided by reflections between the inner surface and the outer surface to the Fresnel structure , wherein the Fresnel structure has Fresnel surfaces , which bring about a base deflection of the rays of the imaging beam path by 45 to 55 degrees, characterized in that - the spectacle lens has a radius of curvature of between 100 and 150 mm, - an edge thickening is present in the spectacle lens between the input coupling device and the Fresnel structure , in which edge thickening the thickness of the spectacle lens is greater than in the region of the Fresnel structure , and - the input coupling device couples the imaging beam path in between the inner surface and the outer surface of the spectacle lens in such a way that the first reflection (R1) takes place after the input coupling at the outer surface of the spectacle lens and the second reflection (R2) takes place after the input coupling in the region of the edge thickening at a reflection surface arranged on the inner side of the spectacle lens . - at least one spectacle lens to be worn in front of the eye, said spectacle lens having an inner surface that is to face the eye and an outer surface that is to face away from the eye, - an input coupling device for coupling an imaging beam path emanating from the initial image in between the inner surface and the outer surface of the spectacle lens , and - a Fresnel structure present in the spectacle lens and serving for coupling the imaging beam path out from the spectacle lens in the direction of the eye, wherein the input coupling device couples the imaging beam path in between the inner surface and the outer surface of the spectacle lens in such a way that it is guided by reflections between the inner surface and the outer surface to the Fresnel structure , wherein the Fresnel structure has Fresnel surfaces , which bring about a base deflection of the rays of the imaging beam path by 45 to 55 degrees, characterized in that - the spectacle lens has a radius of curvature of between 100 and 150 mm, - an edge thickening is present in the spectacle lens between the input coupling device and the Fresnel structure , in which edge thickening the thickness of the spectacle lens is greater than in the region of the Fresnel structure , and - the input coupling device couples the imaging beam path in between the inner surface and the outer surface of the spectacle lens in such a way that the first reflection (R1) takes place after the input coupling at the outer surface of the spectacle lens and the second reflection (R2) takes place after the input coupling in the region of the edge thickening at a reflection surface arranged on the inner side of the spectacle lens . <EOS>