Eyes in platyhelminthes?

Platyhelminthes, commonly known as flatworms, have a simple sensory system that includes light-sensitive cells called ocelli. These ocelli are not true eyes but rather light-detecting organs that allow the flatworms to sense changes in light intensity and direction. They are usually located on the head or along the body of the flatworms. The ocelli help the flatworms to detect the presence of light and shadows, which can be important for their survival and orientation in their environment. However, they do not possess complex visual organs like true eyes found in higher organisms.