Bachelor of Health Science Practice Exam 2025 – Complete Prep Guide

The retina is the correct answer because it contains the photoreceptor cells, specifically rods and cones, which are specialized nerve cells that detect light. These cells convert light impulses into electrical signals that are subsequently transmitted to the optic nerve, which carries the information to the brain for processing. The retina functions as the sensory layer of the eye, playing a crucial role in vision by enabling the perception of images.

The other parts mentioned, such as the ciliary body, iris, and pupil, have different functions. The ciliary body is primarily involved in focusing the lens and regulating the amount of light that enters the eye, while the iris is responsible for controlling the size of the pupil to adjust the amount of light entering. The pupil is simply the opening through which light passes into the eye. Each of these structures is important for vision, but they do not function to transmit light impulses to the optic nerve like the retina does.