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It's a new day.

The process for inclusion in Thomson Reuters’ databases is exclusive. Each year, Thomson Reuters’ editorial staff reviews more than 2,000 journal titles and selects about 10% to 12% of the journals evaluated for inclusion in the Thomson Reuters database.1 Eye & Contact Lens is proud to join this prestigious group of journals; indexing of Eye & Contact Lens content will start with the January 2008 issue. When the 2010 version of the Journal Citation Report (JCR) is published in June 2011, Eye & Contact Lens will have its first impact factor (IF). In 2007, only approximately 18% of the ophthalmology and vision science journals were in the JCR. An IF is “a measure of the frequency with which the ‘average article’ in a journal has been cited in a particular year or period. The annual JCR IF is a ratio between citations and recent citable items published. Thus, the IF of a journal is calculated by dividing the number of current year citations to the source items published in that journal during the previous 2 years.”2 This has been clearly elucidated by Duffel and Weingeist3 “JIF A/B, where A the number of times articles published in years 1 and 2 were cited in journals indexed by Institute for Scientific Information during year 3; and B the number of “citable items” (articles and reviews but not correspondence) published in years 1 and 2.” The IF was devised by Eugene Garfield, born September 16, 1925. He is an American scientist and the founder of the Institute for Scientific Information, now part of Thomson Reuters. The IF was designed to be used by librarians and researchers to provide qualitative evidence to assess a journal in relation to other journals in the same discipline or specialty. It has become a rough gauge of the prestige of a journal. Because of the many criteria that influence citation rates, the IF should not be used exclusively to assess the usefulness of a journal. The IF does not describe the circulation of the journal nor does it measure or convey the clinical utility of the journal and it doesn’t measure the quality or impact of an article within that journal. But there is little doubt that authors would rather publish their scientific work in journals that have an IF. The publication and citation record of an individual will influence the h index as described by Hirsh4 and it’s obvious that one’s article is likely to be cited more often if its published in a journal with an IF. This has been a long time coming for Eye & Contact Lens and formally the CLAO Journal. The last application was almost 5 years ago. Now it’s with great anticipation to see where we rank and the inevitable attempt to climb the ladder.