The blind spot of the eye is d where the optic nerve leaves the eye. This area lacks photoreceptors, meaning there are no rods or cones to detect light. When light falls on this part of the retina, the brain does not receive any visual information, resulting in a ‘blind’ area in our field of vision.
To elaborate, the optic nerve is responsible for transmitting visual information from the retina to the brain. As it exits the eye, there are no sensory cells in that precise spot, creating the blind spot. Interestingly, our brains are quite adept at filling in this gap by using information from the rest of our visual field, so we usually don’t notice it in our daily experience.