Systems and methods for determining an identity of an individual by using blue light adjustment with a wearable display system are provided. Embodiments of the systems and methods for blue light adjustment can include receiving eye images of an eye exposed to different levels of blue light relative to non-blue light； analyzing the images to determine a change in a pupil parameter in the images； determining that the change in the pupil parameter matches a biometric characteristic of a human individual； and determining an identity of the human individual.
