An ophthalmic device is provided with an illumination optical system configured to irradiate light irradiated from a light source as parallel light to a subject's eye at an oblique angle, the light source being configured to emit coherent light； an image capturing optical system comprising a light receiving element and configured to capture a reflected image by receiving first reflected light and second reflected light by the light receiving element, the first reflected light being reflected from an anterior surface of a cornea of the subject's eye, the second reflected light being different from the first reflected light and reflected from a posterior surface of the cornea of the subject's eye； and a controller configured to calculate a thickness of the cornea by using the reflected image captured by the image capturing optical system.
