Retina: The retina is a layer at the back of the eye containing specialized cells called photoreceptors that convert light into electrical signals for processing by the brain.
Rods: Rods are photoreceptor cells in the retina that are highly sensitive to dim light and are responsible for peripheral vision and black-and-white vision.
Cones: Cones are another type of photoreceptor cells in the retina that are responsible for color vision and visual acuity.