Research Papers. 1  Establish your topic. 2  Look for sources of information. 3  Read your sources and take notes. 4  Organize your ideas. 5  Write a first draft. 6  Use footnotes or endnotes to document sources. 7  Write a bibliography. 8  Revise the first draft. 9  Proofread the final draft.
The Retina. The retina is a light-sensitive layer at the back of the eye that covers about 65 percent of its interior surface. Photosensitive cells called rods and cones in the retina convert incident light energy into signals that are carried to the brain by the optic nerve.
It is composed of three concentric layers (also called coats) with different structures and functions. The tough outermost layer of the eye is known as the fibrous layer and is composed of two fused but physically quite different structures: Sclera â white of the eye. Cornea â window of the eye.