Answer: Cornea
Step-by-step explanation:
Cornea is a transparent outer surface of the eye. It covers the inner parts of the eye ball. It is the first part of the eye through which the light enters the eye. The refractive power of the cornea bends the incident light rays, in such a way that they pass through the pupil. From pupil the light enters the opening of the iris through which the light enters the eye. The iris is like shutter of a camera. It regulates the amount of light entering the eye.