This narrative...
optogenetics
/ˌɒptəʊdʒɪˈnɛtɪks/
BIOLOGY
a technique in neuroscience in which genes for light-sensitive proteins are introduced into specific types of brain cells in order to monitor and control their activity precisely using light signals.
"optogenetics allows researchers to control how nerve cells communicate"
Reminds me also to Fresnell, the foraminifera species with vacuoles filled with alga / plankton and the propagation of the light towards the internal chambers with the alga trough all their tiny holes and the glinstering wall wands of those chambers. Thats a really funny subject.>
https://en.wikipedia.org/wiki/Augustin-Jean_Fresnel
https://en.wikipedia.org/wiki/Foraminifera
https://en.wikipedia.org/wiki/Opal
https://en.wikipedia.org/wiki/Hyalite