{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T00:09:08Z","timestamp":1776730148324,"version":"3.51.2"},"reference-count":30,"publisher":"BMJ","issue":"11","funder":[{"name":"Sichuan Provincial Health Bureau Research Fund, China","award":["No.150063"],"award-info":[{"award-number":["No.150063"]}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["BMJ Open"],"accepted":{"date-parts":[[2019,10,9]]},"published-print":{"date-parts":[[2019,11]]},"abstract":"<jats:sec>\n                    <jats:title>Objectives<\/jats:title>\n                    <jats:p>To assess the prevalence of visual impairment (VI) and blindness (BL) due to cataract and cataract surgical outcomes in remote dispersed and high-altitude Tibetan areas of China.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Design and setting<\/jats:title>\n                    <jats:p>A cross-sectional study was conducted among people aged 50 and above in Tibetan Autonomous Prefecture of Kandze (TAPK), China, in 2017. The Rapid Assessment of Avoidable Blindness protocol was followed.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Participants<\/jats:title>\n                    <jats:p>Of 5000 eligible participants, 4764 were examined (response rate 95.3%).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Primary and secondary outcome measures<\/jats:title>\n                    <jats:p>Cataract VI was defined as lens opacity at visual acuity (VA) levels of &lt;3\/60 (Blindness (BL)), \u22653\/60 and &lt;6\/60 (severe visual impairment (SVI)), \u22656\/60 and &lt;6\/18 (moderate visual impairment (MVI)), \u22656\/18 and &lt;6\/12 (early visual impairment (EVI)).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>The estimated prevalence of cataract BL was 0.61% (95% CI 0.42 to 0.87). With best corrected VA, the estimated prevalence of SVI from cataract was 0.86% (95% CI 0.63 to 1.17); MVI was 2.39% (95% CI 2.00 to 2.87) and EVI was 5.21% (95% CI 4.61 to 5.87). Women in TAPK had a significantly higher prevalence of cataract BL (0.82%, 95%\u2009CI 0.54 to 2.15) than men (0.34%, 95%\u2009CI 0.16 to 0.70). Women had lower cataract surgical coverage (CSC) by eyes (60.8%, 95%\u2009CI 55.5 to 65.8) compared with men (70.1%; 95%\u2009CI 63.7 to 75.7). The prevalence of cataract BL was higher among Tibetan (2.28%; 95%\u2009CI 1.98 to 2.62) than Han Chinese (1.01%%; 95%\u2009CI 0.54% to 1.87%). Overall CSC by person with BL (by better eye) was 82.0% (95% CI 75.2 to 87.6). Among cataract-operated participants, 71.2% had VA equal to or better than 6\/18.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The study detected a low prevalence of VI and BL due to cataract with high CSC in the study area compared with many other places in China. Further actions should be taken to improve cataract surgical outcome.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1136\/bmjopen-2019-031337","type":"journal-article","created":{"date-parts":[[2019,11,4]],"date-time":"2019-11-04T07:46:40Z","timestamp":1572853600000},"page":"e031337","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":10,"title":["Prevalence and service assessment of cataract in Tibetan areas of Sichuan Province, China: population-based study"],"prefix":"10.1136","volume":"9","author":[{"given":"Danba","family":"Jiachu","sequence":"first","affiliation":[{"name":"Kham Eye Centre, Kandze Prefecture People's Hospital, Kangding, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ling","family":"Jin","sequence":"additional","affiliation":[{"name":"Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Feng","family":"Jiang","sequence":"additional","affiliation":[{"name":"Kham Eye Centre, Kandze Prefecture People's Hospital, Kangding, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Luo","sequence":"additional","affiliation":[{"name":"Kham Eye Centre, Kandze Prefecture People's Hospital, Kangding, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hong","family":"Zheng","sequence":"additional","affiliation":[{"name":"Kham Eye Centre, Kandze Prefecture People's Hospital, Kangding, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Duo","family":"Ji","sequence":"additional","affiliation":[{"name":"Kham Eye Centre, Kandze Prefecture People's Hospital, Kangding, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Yang","sequence":"additional","affiliation":[{"name":"Kham Eye Centre, Kandze Prefecture People's Hospital, Kangding, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nima","family":"Yongcuo","sequence":"additional","affiliation":[{"name":"Kham Eye Centre, Kandze Prefecture People's Hospital, Kangding, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenyong","family":"Huang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Ophthalmology, Zhongshan Opthalmic Centre, Sun Yat-sen University, Guangzhou City, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jinglin","family":"Yi","sequence":"additional","affiliation":[{"name":"Nanchang University Affiliated Eye Hospital, Nanchang University, Nanchang, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tess","family":"Bright","sequence":"additional","affiliation":[{"name":"International Centre for Evidence in Disablility, London School of Hygiene & Tropical Medicine, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jennifer LY","family":"Yip","sequence":"additional","affiliation":[{"name":"International Centre for Evidence in Disablility, International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Baixiang","family":"Xiao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Ophthalmology, Zhongshan Opthalmic Centre, Sun Yat-sen University, Guangzhou City, China"},{"name":"Nanchang University Affiliated Eye Hospital, Nanchang City, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2019,11,3]]},"reference":[{"key":"2025121523545966000_9.11.e031337.1","doi-asserted-by":"crossref","first-page":"e1221","DOI":"10.1016\/S2214-109X(17)30393-5","article-title":"Global causes of blindness and distance vision impairment 1990-2020: a systematic review and meta-analysis","volume":"5","author":"Flaxman","year":"2017","journal-title":"Lancet Glob Health"},{"key":"2025121523545966000_9.11.e031337.2","unstructured":"IAPB Vision Atlas . 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