What exactly is the blind spot? It is the place where the optic nerve meets the back of the retina. Because no sensory cells are present in the retina at the meeting point, a “hole” is created in the field of view of each eye. The brain “fills in” the hole with what “ought” to be there, so we usually don’t notice the blind spots. In this activity, students will determine several characteristics of the visual blind spot, including its approximate size and shape, as well as its impact on daily life. This lesson will tie in nicely with Activities 6, 7, and 17. This free selection includes the Table of Contents, Introduction, and Index.