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.
The cornea can be referred to as, âthe window to the eyeâ. It is in the front of the eye and covers the iris, pupil and anterior chamber. The human cornea is comprised of six different cell layers: Epithelium, Bowmanâs Layer, Stroma, Duaâs Layer, Descemetâs Membrane and Endothelium. The epithelium is the outermost layer of the cornea and accounts for about 10% of the cornea tissueâs thickness. The epithelial layer has two main functions: to obstruct the passage of foreign materials and to absorb oxygen and nutrients from the eyeâs tears to provide a smooth surface layer.