Earthworms do not possess true eyes like humans do, so their vision is limited. They have light-sensitive cells called photoreceptors that allow them to perceive changes in light and darkness. While they can detect variations in brightness, they lack the necessary structures to perceive color. Earthworms have simple eyespots or pigmented cells located on their skin, which can detect light but not specific colors. These eyespots help them navigate between light and dark environments and aid in detecting potential predators. Earthworms primarily rely on other sensory mechanisms, such as touch and vibration receptors, to navigate their underground habitats. Their visual abilities are geared towards survival rather than discerning color variations in their surroundings.