Judged: two independent readers; copy check clear.
photopigment
photopigment A photopigment is a light-sensitive visual substance in the rods and cones of the eye that helps detect light for image formation.
A photopigment is a light-sensitive visual substance in the rods and cones of the eye that helps detect light for image formation. In this packet, photopigments are described as being formed by opsins and differing in the wavelengths of light they absorb most strongly.