Retinal ischemia can be regarded as possible aftereffect of central retinal vein occlusion (CRVO). Ischemia means a tissue having reduced blood supply to an insufficient level. Lack of oxygen in the retinal tissue may lead to retinal cell death or cell dysfunction, and thereby, result in reduced vision. It is a common cause of visual impairment and loss of vision. The causes of retinal ischemia may be: vein and artery occlusions, diabetes and macular degeneration and more.
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