“Light is the most exquisite and versatile tool in the universe.” – Richard Feynman, Nobel Laureate in Physics. Feynman’s words highlight the power of optogenetics. This technology blends genetics and optics to explore the brain. It offers hope for those with psychiatric disorders, giving us control over brain circuits. Optogenetics started in 2005. It uses light-sensitive proteins to control specific brain cells. By adding genes…