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Cross-sectional validation studies of registered clients included interviews, visual function and cause ascertainment in July 2013, and interviews and visual function in July 2016.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      The TTBWA register included 863 people (all ages, 48.1%(\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009415) male) registered between 1951 and 2015. The NESTT identified 1.1%(75\/7158) people aged \u22655years eligible for partial or severe SI registration, of whom 49.3%(\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200937) were male. Registration coverage was approximately 7% of the eligible population of Trinidad. Nevertheless, there was close agreement in the causes of SI comparing the register and population-representative survey. Glaucoma was the leading cause in both the register (26.1%,\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u2009225) and population-based survey (26.1%, 18\/69 adults), followed by cataract and diabetic retinopathy. In the validation studies combined, 62.6%(93\/151) clients had severe SI, 28.5%(43\/151) had partial SI and 9.9%(15\/151) did not meet SI eligibility criteria. SI was potentially avoidable in at least 58%(\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u200936\/62) adults and 50%(\n                      <jats:italic>n<\/jats:italic>\n                      \u2009=\u20097\/14) children.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>We report very low register coverage of the SI population, but close agreement in causes of SI to a contemporaneous national population-based eye survey, half of which resulted from preventable or treatable eye disease.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1038\/s41433-024-02943-3","type":"journal-article","created":{"date-parts":[[2024,2,7]],"date-time":"2024-02-07T06:02:30Z","timestamp":1707285750000},"page":"2134-2142","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Sight impairment registration in Trinidad: trend in causes and population coverage in comparison to the National Eye Survey of Trinidad and Tobago"],"prefix":"10.1038","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-2076-8281","authenticated-orcid":false,"given":"Shivaa","family":"Ramsewak","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Frank","family":"Deomansingh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Blaine","family":"Winford","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Debra","family":"Bartholomew","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vedatta","family":"Maharaj","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amandi","family":"Fraser","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deo","family":"Singh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kenneth","family":"Suratt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vrijesh","family":"Tripathi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin","family":"McNally","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Subash","family":"Sharma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5662-3325","authenticated-orcid":false,"given":"Covadonga","family":"Bascaran","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Samuel S.","family":"Ramsewak","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8169-1645","authenticated-orcid":false,"given":"Rupert R. 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