The retina contains different types of neurons that work together to transmit visual signals to the brain. Photoreceptors (rods and cones) detect light and transmit signals via bipolar and horizontal cells. Amacrine cells help analyze the visual signal before it leaves the retina via ganglion cells, whose axons form the optic nerve. Different regions of the retina contain more rods or cones depending on the need for visual acuity or light sensitivity. Ganglion cells come in X, Y, and W types that transmit different aspects of the visual image like fine details, rapid movement, or directional movement.