Final answer:
False, light first enters the eye through the cornea, not the lens. The eye's cornea refracts the light, which then passes through the pupil before being further focused by the lens onto the retina.
Step-by-step explanation:
False. Light does not first enter the eye through the lens. When we look at the process of vision, the first structure that light encounters as it enters the eye is the cornea. The cornea is a clear, protective outer layer that refracts the incoming light. After passing through the cornea, light proceeds to travel through the aqueous humor and then enters the pupil, which is the opening that regulates the amount of light entering the eye. Only after the pupil does the light reach the lens, which further focuses it onto the retina at the back of the eye.
The focusing of light on the retina is crucial for vision. The retina is lined with photoreceptor cells (rods and cones) that translate light into nerve impulses. These impulses are sent to the brain via the optic nerve, where they are processed to form the images we see. The process of light refraction and focusing by the cornea and lens combined allows us to see clear images at various distances.