This repo contains the Julia code for the ray tracer used in the article titled "The mirror-based eyes of scallops demonstrate a light-evoked pupillary response" by Hayley V. Miller, Alexandra C.N. Kingston, Yakir L. Gagnon, and Daniel I. Speiser published in Current Biology 2019 (DOI), as well as the poster titled "Sensitivity in imperfect eyes" by Yakir Luc Gagnon, Daniel Speiser, and Dan-Eric Nilsson presented in the Fourth International Conference on Invertebrate Vision 2019.