13- Vitale S, Sperduto R, Ferris III F. Increased Prevalence of Myopia in the United States Between 1971-1972 and 1999-2004. Arch Ophthalmol 2009; 127(12): 1632-39.

13- Vitale S, Sperduto R, Ferris III F. Increased Prevalence of Myopia in the United States Between 1971-1972 and 1999-2004. Arch Ophthalmol 2009; 127(12): 1632-39.