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.
Retinal pigment epithelium: This layer lying betwen the retina and choroid, contains melanocytes that make for its characteristic black color. This pigment allows the inside of the eye to absorb stray rays of light like the black paint inside a camera or within a dark room.he eyes are housed in protective bony structures of the skull called the orbits. Each eye is composed of a tough outer layer, the sclera and cornea; a middle layer, the choroid, ciliary body and iris; and the inner layer of nerve tissue called the retina.