1 of 5000

|

wood prints device wood prints university wood prints beam wood prints beams wood prints chromatic wood prints colour wood prints colours wood prints evolution wood prints evolving wood prints eye wood prints four wood prints genetic wood prints light wood prints mixed wood prints mixing wood prints

photographs device photos university photos beam photos beams photos chromatic photos colour photos colours photos evolution photos evolving photos eye photos four photos genetic photos light photos mixed photos mixing photos

Add This Artwork to Your Favorites Collection

Comment

Add This Artwork to Your Favorites Collection

Comment

Four-colour vision research. Research subject (upper left) undergoing a test for four-colour vision or tetrachromacy. This is a rare genetic mutation (on the X chromosome) that would form an extra type of cone cell on the retina. Only female tetrachromats are possible. The beams of light are used to test whether potential tetrachromats can perceive different colours to those normally seen. A mixture of green (near side) and red (centre) light appears yellow to trichromats, but the mix may look different to the comparison yellow light (far side) to a tetrachromat. Photographed at the University of Newcastle-upon-Tyne, England, 2004.

Science Photo Library (SPL) is the leading source of science images and footage. Sourced from scientific and medical experts, acclaimed photographers and renowned institutions, our content is unrivaled worldwide. Outstanding quality, accuracy and commitment to excellence are deeply embedded in our DNA. Science Photo Library inspires creative professionals and delivers engaging content of the highest quality for a wide range of clients in a variety of sectors. Visit sciencephoto.com for more information and stay connected on Twitter, LinkedIn, Instagram and Vimeo.