How light photons trigger a chemical cascade in your eyes
Vision is more than just light hitting a lens; it is a complex molecular transformation. This video explores how a single molecule changes shape to initiate the neural signals that allow you to see.
At the molecular level, the process of sight begins within the rod and cone cells of the eye. The central player is a molecule known as retinal. When photons of visible light strike this molecule, it undergoes a conformational change, flipping from one shape to another.
This physical shift triggers the phototransduction cascade, a sequence of events that eventually results in neurons firing within the brain. Understanding this chemical reaction reveals the fundamental link between light and perception.
Source: Vision Is Actually A Chemical Reaction
