Which sensory membrane lines the eye and is critical for vision?

The retina is a critical sensory membrane in the eye responsible for vision. It is located at the back of the eye and contains photoreceptor cells known as rods and cones. These cells convert light that enters the eye into electrical signals, which are then sent to the brain via the optic nerve. The rods are sensitive to low light levels, making them important for night vision, while the cones are responsible for color vision and function best in bright light.

The retina plays a pivotal role in capturing visual stimuli and processing these signals to allow for perception of the surrounding environment. It is crucial for forming images, as it is the site where the light rays that enter through the pupil are focused. This makes the retina indispensable for proper visual function.

In contrast, the iris is the colored part of the eye that controls the diameter of the pupil and regulates the amount of light entering the eye, while the cornea is the transparent front layer of the eye that helps to focus light. The lens further aids in focusing light onto the retina but does not have sensory capabilities. Therefore, the retina stands out as the key membrane associated with the sensory processing necessary for vision.