Eyes are the organ of vision which collects light and convert it into electro chemical signals and send it to neurons. Photoreceptor cells are present in the conscious that connect the light to movement. Eyes collect the light from the surrounding environment and regulate its intensity by the help of diaphragm. With the help of lens it forms an image and this image is converted into electrical signals. These signals are sent to the brain through complex neural pathways that connect the eye via the optic nerve to the visual cortex and other areas of the brain.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on September, 2014