Feature Significance Cornea Bends light toward the retina. Pupil Forms an opening in the iris. Lens Focuses light onto the retina. Retina Contains rods, cones, and other visual neurons in its layers of cells. Fovea (area of the retina) Processes detailed vision. Feature Significance Thalamus Acts as the target for most axons forming the optic tracts. Primary visual cortex Receives visual input from the (area in the occipital thalamus and performs initial lobe) analysis of input. Credits: Top row— Argosy Publishing , Inc.; Second row— Argosy Publishing , Inc.; Third row— Argosy Publishing , Inc.; Fourth row— Argosy Publishing , Inc.; Fifth row— Argosy Publishing , Inc.; Sixth row— Argosy Publishing , Inc.; Bottom row— Argosy Publishing , Inc.