A tiny eye | Neuro-patch
A single celled organism called Erythropsidinium has been reported to have a tiny eye. This organism is not a simple bacteria sort of cell but is a eukaryote. It is single celled but has the kind of cell that is found in multicelled organisms like us. It is not a bag of chemicals but is highly organized with a nucleus and organelles. Among the organelles is a little eye and a little harpoon – 'all the better to hunt with, my dear'. The eye (called an ocelloid) is like a camera with a lens and pigment responders; while the harpoon is a piston that can elongate 20 or so times in length very quickly and has a poison tip. The prey is transparent but has a nucleus that polarizes light and it is the polarized light that the ocelloid detects. This results in the harpoon being aimed in the direction of the prey before it is fired. That sounds like a link between a sensory organelle and a motor organelle. As far as I can see, it is not known how the linking mechanism works but in a single