Vision is one of the most complex functions of our brain and requires a seamless interaction between many different brain structures to decode shapes, colours, depths, and movements and turn them into a meaningful whole. Just like other brain functions, vision also depends on a balanced and controlled interaction between the chemical signals that “activate” and “brake” activity in the eye’s cells – much like the accelerator and brake of a car. In research, the “brake” is known as GABA, which stands for gamma-aminobutyric acid, and it is the primary neurotransmitter that inhibits nerve activity and helps regulate the balance between excitatory and inhibitory signals in the brain.
Neuroscientific researchers have long been particularly interested in…