An optical element (200), has a first surface configured to convey light, a second surface configured to convey light, an optical path between the first surface and the second surface, a filter coating (230) applied to the first surface, and a colour corrected anti-reflection (AR) coating (240) with colour correcting and antireflection characteristics applied to the second surface. The AR coating is configured according to an antireflective function to maximise photopic transmission and/or, integrated visual photopic transmission (IVPT) of the optical path. The second surface is disposed opposite the first surface, and the antireflective function is determined according to a daylight emission a I(λ), a transmission spectrum of the antireflection/colour corrective coating T(λ) and a thickness a d(λ), of the film for a specified wavelength.