TABLE 1. Criteria for a review of literature on trachoma in the Americas conducted by the Dana Center for Preventive Ophthalmology, 2015.

Criteria	Details
Databases for electronic search	MEDLINE, Embase, LILACS, SCOPUS, and Web of Science; PAHO/WHO library databases; and unpublished gray literature from websites of Ministries of Health, tropical/infectious diseases institutions, and biomedical institutions.
Language restrictions	None.
Date restrictions	Scientific literature published until 13 July 2015.
Search terms	For MEDLINE, EMBASE, SCOPUS, LILACS and Web of Science: trachoma OR scarring trachoma OR entropion OR trichiasis OR ocular chlamydia OR corneal opacity OR blindness survey AND name of the country. For MEDLINE, exclusion words added for the United States were NOT sexual NOT Sexually transmitted disease NOT Neisseria gonorrhoeae NOT animal. For EMBASE, search was restricted to humans. For LILACS, search term Trachoma was added.
Inclusion criteria	(a) Population studied: school children, clusters within populations, and state/province or national surveys. (b) Type of study: historical data (pre-1940), single case report, clinical case series, risk factors study, blindness survey, trachoma prevalence survey, and clinical trials. (c) Outcomes: cases of trachoma, based on the WHO trachoma grading system or the Macallan/modified-Macallan grading system, or “unknown” if the outcomes were measured prior to 1930; and/or prevalence of trachoma.

Source: Prepared by the authors with permission from the authors of the (unpublished) original study.