An ocelloid is a subcellular structure found in the family Warnowiaceae, which are members of a group of unicellular organisms known as dinoflagellates. Wikipedia

Eye-like subcellular structure found in dinoflagellates (a large group of single-celled eukaryotes). Consists of subcellular analogues to a cornea, lens, iris, and retina. Ocelloids are built from pre-existing organelles, including a cornea-like laye Wikidata

A cellular structure found in unicellular microorganisms that is analogous in structure and function to eyes, which focus, process and detect light. Wiktionary