1. Describe the anatomy and function of the human eye.  Conjunctiva- a delicate membrane that covers the surface of the eye and the inside of eyelids. Protects the front of the eye.  Cornea- The front part of the eyeball. It is transparent, relatively thick. Bends light rays as they pass through it.  Sclera- Continuous with the cornea but not transparent. Forms tough white outer back part of eyeball. Protects the eye, helps maintain …showed first 75 words of 500 total…

…showed last 75 words of 500 total…refractive media. They bend light as it enters the eye. c) Identify the conditions under which refraction of light occurs When light passes through a denser medium (such as water) its speed is slowed down. The denser the medium, the more it decreases its speed and the greater the refractive index of the medium as compared to air. If light waves hit the new medium at an angle, the light waves are bent or refracted.