Question: what causes single cell eye

Michael Kimwele answered on 17 Jul 2025:

The question is ambiguous. It’s unclear if the user is asking about a single-celled organism with an eye, or a single cell within a multicellular eye. If referring to a single-celled organism, then the “eye” would be a simple light-sensitive structure, often called an eyespot, which is not a true eye with lenses and other complex components. If referring to a single cell within a multicellular eye, the question is likely about the photoreceptor cells (rods and cones) in the retina, which are responsible for light detection. These cells are not single-celled organisms, but rather specialized cells within a complex organ.