In binocular vision, both eyes must adjust so the image falls on corresponding parts of which part?

In binocular vision, the eyes work together to create a single, cohesive image. For this to happen effectively, it is essential that the images from both eyes fall on corresponding parts of the retina. The retina is the layer of light-sensitive cells at the back of each eye that detects light and sends signals to the brain, allowing us to perceive images. When both eyes are accurately aligned, the brain can merge the slightly different perspectives from each eye into a unified three-dimensional view.

The other structures mentioned in the options play different roles in vision. The lens is responsible for focusing light onto the retina, while the cornea, which covers the front of the eye, helps to refract light. The iris regulates the amount of light entering the eye by controlling the size of the pupil but does not directly relate to where images fall when both eyes are aligned for binocular vision. Therefore, the retina is the critical area for corresponding visual input from both eyes to achieve accurate depth perception and visual clarity.