sci期刊是否允许共一？

本人一篇文章，拟投Optometry and Vision Science，查了既往文章没看到有标注共一的，文章最后会有标注作者贡献，写了某人负责了哪项工作，它的投稿需知也没写不可以共一，投稿需知中有：You may designate any author as the First or Corresponding Author; please note that changing the Corresponding Author designation transfers this submission to that author's account. Once authors have been added, click and drag any author's name to change the order. You may edit an author's information by clicking the pencil icon. Co-author email addresses are required. An Editorial Manager Author Account is required for designation as the Corresponding Author. If the submitting author designates an unregistered co-author as the Corresponding Author, they will be directed to register an account profile for that author. Author affiliations should list the author’s department, school, then institution. If there are multiple departments, list them before listing school or institutions, e.g. Department of Optometry and Vision Science, Biomedical Engineering, and Ophthalmology, College of Optometry, State University of New York. Choose from the drop-down list of author contributions: Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing (See also: Authorship Requirements above). 

请问这种情况下，这个期刊是可以共同第一作者的吗？还是说不可以的意思？