A comprehensive search for guidelines was undertaken to identify the most relevant guidelines to consider for adaptation.

The main source was the Pediatric Ophthalmology/Strabismus Preferred Practice Pattern published by the American Academy of Ophthalmology, last edition of 2022 (3) and Comprehensive Pediatric Eye and Vision Examination by the American Optometric Association 2017 (4)

The inclusion/exclusion criteria followed in the search and retrieval of guidelines to be adapted:

• Selecting only evidence-based guidelines (guideline must include a report on systematic literature searches and explicit links between individual recommendations and their supporting evidence)
• Selecting peer reviewed publications only
• Selecting guidelines written in English language
• Excluding guidelines written by a single author not on behalf of an organization in order to be valid and comprehensive, a guideline ideally requires multidisciplinary input
• Excluding guidelines published without references as the panel needs to know whether a thorough literature review was conducted and whether current evidence was used in the preparation of the recommendations

The following characteristics of the retrieved guidelines were summarized in a table:

• Developing organization/authors
• Date of publication, posting, and release
• Country/language of publication
• Date of posting and/or release
• Dates of the search used by the source guideline developers