The rest of this editorial is devoted to reviewers. As mentioned in previous editorials, I believe that reviewers are the unsung heroes of scholarly journals. Generally operating in anonymity, they ensure that published articles meet the journal’s standards of originality, significance, scientific accuracy, and professional quality. In 2015, Optical Engineering benefitted from the work of roughly 1700 reviewers who volunteered their time for this important professional responsibility, many performing multiple reviews. In recognition of their services, this issue includes a complete list of all of the active Optical Engineering reviewers in 2015. If you are a contributing reviewer, I would like to personally thank you for your support of the journal since we simply could not function without it.