The light ray entering the eye goes through the following route

The human eye is a complex organ that works by refracting and focusing light onto the retina at the back of the eye. The light ray entering the eye goes through the following route: The correct option is: "II, I, III, IV". - The cornea (II) is the transparent outer layer of the eye that first refracts and bends the light rays as they enter the eye. - The iris (I) controls the amount of light entering the eye by adjusting the size of the pupil. The pupil dilates in dim light and constricts in bright light. - The lens (III) located behind the iris, further refracts and focuses the light rays onto the retina. - The retina (IV) at the back of the eye, converts the light energy into neural signals that are sent to the brain through the optic nerve. Therefore, the correct sequence of the route taken by light as it enters the eye is II (cornea), I (iris), III (lens), and IV (retina).