Ford produced Model Ts in this manner for three years at its new Highland Park plant before adopting the assembly line. When modern drivers think about the Ford Model Tâif they think about it at allâthey perhaps dimly perceive it as the car that changed the world.
The Cornea. The cornea represents the strongest part of the refracting power of the eye, providing about 80% of the power of the system. The index of refraction of the cornea is about 1.376. Rays pass from the cornea into the watery fluid known as the aqueous humor which has an index of refraction of about 1.336, so most of the refraction is at the cornea-air interface.
Structure of the Retina of The Eye. Above: Diagram of the structure of the retina. This page is a summary of the anatomical structures of the retina, which is the light-sensitive layer at the back surface of the eye. The retina includes many intricate structures essential for vision. Different textbooks report different numbers of layers of the retina. For example, some texts identify as few as six layers, while others describe the retina in terms of as many as ten different layers.