GENERAL INFORMATION International Journal of Ophthalmology--IJO,published continuously since 2008,a global ophthalmological scientific publication and a peer-reviewed,open access periodical published in print and online monthly (ISSN:2222-3959 print,ISSN: 2227-4898 online).IJO is sponsored by the Chinese Medical Association Xi'an Branch,China and obtains guidance,and support from World Health Organization (WHO)and International Council of Ophthalmology (ICO).