These candy-colored "trees" are actually the cells that enable you to see in the dark. They're called rod cells, and humans have some 120 million of them lining the back of the eye, shooting signals to the brain when they're stimulated by light. Rods are sensitive to very dim light, unlike their counterparts, cones, which allow us to see color.
samm | 21 | art, beauty, and anything else that i love | message or ask me about anything | southern california personal tumblr: @somethingsoffinside i do not own any of the things i post unless otherwise stated. all credit goes to the original artists.