Your eyes

A close-up of a human eye with a blue iris, showing the pupil contracting and dilating in response to changing light, with the iris texture and surrounding skin visible. The scene transitions to a brown-eyed eye, where the pupil contracts sharply, followed by a shift to a grey-eyed eye with a dilated pupil, then back to the brown eye with a contracting pupil, ending on a close-up of the brown iris with a bright reflection.