Eyes in platyhelminthes, Annelida and Cephalopods?

Platyhelminthes (flatworms) do not have true eyes. Instead, they have simple light-sensitive cells called ocelli that can detect changes in light intensity and direction.

Annelida (segmented worms) have a variety of eye structures depending on the species. Some annelids have simple eyespots that can detect light and dark, while others have more complex eyes with lenses that can form images.

Cephalopods (such as squids and octopuses) have well-developed eyes similar to those of vertebrates. Their eyes have a lens, retina, and other structures that allow for advanced vision. Cephalopods have some of the most sophisticated eyes in the animal kingdom and are capable of complex visual tasks, including color vision and depth perception.