An optical device is provided. The optical device includes a central region having a plurality of central pixels, a first region having a plurality of first pixels, a second region having a plurality of second pixels, an organic layer formed in the central region, the first region and the second region, a light collection layer surrounded by the organic layer formed in the first region and the second region, a first light collection element of the light collection layer formed in the first pixel, and a second light collection element of the light collection layer formed in the second pixel. The central region, the first region and the second region are spaced from each other along an arrangement direction, and the first region is closer to the central region than the second region. The first light collection element is different from the second light collection element.