09. Fricke TR, Holden BA, Wilson DA, et al. Global cost of correcting vision impairment from uncorrected refractive error. Bulletin of the World Health Organization 2012;90:728-38.

09. Fricke TR, Holden BA, Wilson DA, et al. Global cost of correcting vision impairment from uncorrected refractive error. Bulletin of the World Health Organization 2012;90:728-38.