It is often claimed that the human retina is poorly designed because it appears to be placed in the eye backwards. This design requires that light travel through the nerves and blood vessels in order to reach the photoreceptor cells which are located behind the eye’s wiring. This design also requires the nerves to pass through the retina in an area that lacks photoreceptors, producing a blind spot, the focus of this paper. One reason the blind spot is not a problem is that the brain uses information from the retina only to construct an image and does an excellent job of dealing with the many “blind spots” such as shadows, reflection problems, dim light, and dirt on a person’s glasses. Furthermore, the blind spot is located in a region used only for peripheral vision to scan beyond a person’s main focus for areas of potential interest.
from Answers in Genesis