The optic nerve head is the part of the eye where the optic nerve connects to the retina. It is located at the back of the eye and is responsible for transmitting visual information from the retina to the brain. The optic nerve head is also known as the blind spot because it lacks photoreceptor cells, meaning it does not detect light. This area is crucial for vision, as it serves as the exit point for nerve fibers that carry signals from the retina. Any damage or swelling at the optic nerve head can lead to vision problems, making it an important focus in eye health assessments.