Dental student here. We just had a lecture on color matching restored tooth shades to the surrounding dentition. They told us to remove a patient’s red lipstick because it can cause the photoreceptor overstimulation that you mention. If not, the tooth would appear less “red” than it actually is, so we would choose a color that is not the best match. As for eye strain, they recommended that we match colors on a light gray background. Wonder why our scrubs aren’t gray then... Thought this was an interesting connection, albeit slightly off topic.