Visual purple, also known as rhodopsin, is a pigment found in the retina of the eye. This crucial chemical component helps us to see in low light conditions. There are a few related synonyms for the term visual purple that you may come across in scientific literature. One common term for this pigment is "rodopsin", which is a combination of "rods" (the specialized cells in the retina that detect light) and "opsin" (the protein that rhodopsin is comprised of). Other synonyms for visual purple include "photosensitive pigment" and "photosensitive protein", as they refer to the light-sensitive properties of this essential component of our visual system.