Safety of Spectacles for Children's Vision: A Cluster-Randomized Controlled Trial

India 2001 census. Dimension of Disability in India, chapter 4. Available at http://mospi.nic.in/Mospi_New/upload/disablity_india_statistical_data_11mar2011/Chapter%204-Dimension_Disability.pdf. Table 4.3 (b). Accessed August 7, 2015. Resnikoff, 2008, Global magnitude of visual impairment caused by uncorrected refractive errors in 2004, Bull World Health Organ, 86, 63, 10.2471/BLT.07.041210 He, 2004, Refractive error and visual impairment in urban children in southern China, Invest Ophthalmol Vis Sci, 45, 793, 10.1167/iovs.03-1051 He, 2007, Refractive error and visual impairment in school children in rural southern China, Ophthalmology, 114, 374, 10.1016/j.ophtha.2006.08.020 Congdon, 2008, Visual disability, visual function and myopia among rural Chinese secondary school children: the Xichang Pediatric Refractive Error Study (X-PRES) Report #1, Invest Ophthalmol Vis Sci, 49, 2888, 10.1167/iovs.07-1160 Esteso, 2007, Correction of moderate myopia is associated with improvement in self-reported visual functioning among Mexican school-aged children, Invest Ophthalmol Vis Sci, 48, 4949, 10.1167/iovs.07-0052 Ma, 2014, Effect of providing free glasses on children's educational outcomes in China: cluster randomized controlled trial, BMJ, 349, g5740, 10.1136/bmj.g5740 Congdon, 2008, Prevalence and determinants of spectacle nonwear among rural Chinese secondary schoolchildren: the Xichang Pediatric Refractive Error Study Report 3, Arch Ophthalmol, 126, 1717, 10.1001/archopht.126.12.1717 Li, 2010, Attitudes of students, parents, and teachers towards glasses use in rural China, Arch Ophthalmol, 128, 759, 10.1001/archophthalmol.2010.73 Odedra, 2008, Barriers to spectacle use in Tanzanian secondary school students, Ophthalmic Epidemiol, 15, 410, 10.1080/09286580802399094 Fuxin Educational Network. “A letter to the parents and students in the city on National Eye Health Day” [in Chinese]. Available at http://www.fxedu.com.cn/bencandy.php?fid=491&id=9417. Accessed August 7, 2015. Beijing Education Bureau. “The Bureau's Recommendations for Young Glasses Wearers and the Young Obese” [in Chinese]. Available at http://edu.ifeng.com/gundong/detail_2011_08/12/8365849_0.shtml. Accessed August 7, 2015. Walline, 2011, Interventions to slow progression of myopia in children (Review), Cochrane Database Syst Rev, CD004916 Adler, 2006, The possible effect of under-correction on myopic progression in children, Clin Exp Optom, 89, 315, 10.1111/j.1444-0938.2006.00055.x Chung, 2002, Undercorrection of myopia enhances rather than inhibits myopia progression, Vision Res, 42, 2555, 10.1016/S0042-6989(02)00258-4 Morgan, 2012, Myopia, Lancet, 379, 1739, 10.1016/S0140-6736(12)60272-4 Wikipedia list of Chinese administrative divisions by GDP per capita in 2012. Available at http://en.wikipedia.org/wiki/List_of_Chinese_administrative_divisions_by_GDP_per_capita. Accessed August 7, 2015. Baidu Encyclopedia: Article on Yulin [in Chinese]. Available at http://baike.baidu.com/view/52250.htm. Accessed August 7, 2015. Baidu Encyclopedia: Article on Tianshui [in Chinese]. Available at http://baike.baidu.com/view/14548.htm. Accessed August 7, 2015. Ferris, 1982, New visual acuity charts for clinical research, Am J Ophthalmol, 94, 91, 10.1016/0002-9394(82)90197-0 Rose, 2008, Myopia, lifestyle, and schooling in students of Chinese ethnicity in Singapore and Sydney, Arch Ophthalmol, 126, 527, 10.1001/archopht.126.4.527 Rose, 2008, Outdoor activity reduces the prevalence of myopia in children, Ophthalmology, 115, 1279, 10.1016/j.ophtha.2007.12.019 Khandekar, 2002, Compliance of spectacle wear and its determinants among schoolchildren of Dhakhiliya region of Oman: a descriptive study, J Sci Res Med Sci, 4, 5 Wedner, 2002, Myopia in secondary school students in Mwanza City, Tanzania: the need for a national screening programme, Br J Ophthalmol, 86, 1200, 10.1136/bjo.86.11.1200 Stone, 2013, Pharmacology of myopia and potential role for intrinsic retinal circadian rhythms, Exp Eye Res, 114, 35, 10.1016/j.exer.2013.01.001 Smith, 2013, Optical treatment strategies to slow myopia progression: effects of the visual extent of the optical treatment zone, Exp Eye Res, 114, 77, 10.1016/j.exer.2012.11.019 Berntsen, 2013, Peripheral defocus and myopia progression in myopic children randomly assigned to wear single vision and progressive addition lenses, Invest Ophthalmol Vis Sci, 54, 5761, 10.1167/iovs.13-11904 Backhouse, 2012, Peripheral refraction in myopia corrected with spectacles versus contact lenses, Ophthalmic Physiol Opt, 32, 294, 10.1111/j.1475-1313.2012.00912.x Sankaridurg, 2010, Spectacle lenses designed to reduce progression of myopia: 12-month results, Optom Vis Sci, 87, 631, 10.1097/OPX.0b013e3181ea19c7 Congdon, 2011, Randomized, controlled trial of an educational intervention to promote spectacle use in rural China: the See Well to Learn Well Study, Ophthalmology, 118, 2343, 10.1016/j.ophtha.2011.06.016