system
Given the following post, respond as if you're commenting on Reddit:
human
What happens to a photon after it has been seen by our eyes?
gpt
Our eyes "see a photon" through the response created in our visual system by the absorption of that photon (or more realistically a stream of such photons) by the biological dyes in our eyes. Since the photon is absorbed, its energy is transferred to the molecules that constitute those biological dyes, and the initial photon ceases to exist.