03. O'Donoghue L, Saunders KJ, McClelland JF, et al. Sampling and measurement methods for a study of childhood refractive error in a UK population. Br.J.Ophthalmol. 2010;94:1150-1154.

03. O'Donoghue L, Saunders KJ, McClelland JF, et al. Sampling and measurement methods for a study of childhood refractive error in a UK population. Br.J.Ophthalmol. 2010;94:1150-1154.