Although data demonstrating the relationship of visual acuity to myopia do exist, no systematic observations over a wide range of degrees of myopia have been made. For example, Laurance and Wood1 give the following tabulation for degrees of myopia ranging from 0.25 to 2.50 D. : Myopia, D.... 2.50 2.00 1.50 1.00 0.75 0.50 0.25 Visual acuity.. 6/60 6/36 6/24 6/18 6/12 6/9 6/6
In a study of 1,860 white school children in Washington, D. C., Kempf and associates2 found 123 with myopia ranging in degree from 0.25 to 11.00 D. The relationship of myopia to visual acuity is presented graphically (fig. 13 of that paper) by a curve which becomes asymptotic to the myopia axis at a visual acuity of 20/200. These highly improbable results are due in part to the fact that only 2 of the 123 subjects had myopia of greater degree than 4.50 D. and