06. Wong, T. Y., Foster, P. J., Hee, J., Ng, T. P., Tielsch, J. M., Chew, S. J., Johnson, G. J., and Seah, S. K. (2000) Prevalence and risk factors for refractive errors in adult Chinese in Singapore. Invest Ophthalmol Vis Sci 41, 2486-2494

06. Wong, T. Y., Foster, P. J., Hee, J., Ng, T. P., Tielsch, J. M., Chew, S. J., Johnson, G. J., and Seah, S. K. (2000) Prevalence and risk factors for refractive errors in adult Chinese in Singapore. Invest Ophthalmol Vis Sci 41, 2486-2494