Photoreception is the process by which organisms detect light through specialized cells called photoreceptors. These cells convert light into electrical signals, allowing the brain to interpret visual information. In humans, photoreceptors are primarily located in the retina of the eye and include two main types: rods, which are sensitive to low light, and cones, which detect color. Different organisms have evolved various photoreception mechanisms. For example, insects possess compound eyes made up of numerous small lenses, enabling them to see a wide range of colors and detect motion effectively. In contrast, some deep-sea creatures have adapted to low-light environments with unique photoreceptors that can sense bioluminescence.