Prevalence and types of refractive errors, and spectacle coverage in Sri Lankan adults: The Sri Lanka National survey of blindness and visual impairment
C. Gilbert,
G. V. S. Murthy,
E. Schmidt,
K. Edussuriya,
R. P. Kumara,
S. A. H. K. Wimalarathne,
A. H. Athapattu,
M. D. Priyangani,
K. R. T. C. Bandara,
C. Rathnayake,
Y. G. U. Jayarathne,
H. B. Pant
