Ingram R M, Barr A
Br J Ophthalmol. 1979 May;63(5):339-42. doi: 10.1136/bjo.63.5.339.
A study has been made of the changes in refraction as a sample of 148 children grew between the ages of 1 and 3 1/2 years. There was no decrease in hypermetropia, but there was a significant decrease in the incidence of astigmatism. Study of the changes in the refraction in the horizontal and vertical meridia of individual eyes gave clear evidence of a trend towards emmetropia if the initial refraction in either meridian was myopic or less than +2.50 D. Above that level the refraction became more or less hypermetropic.
对148名儿童在1岁至3岁半之间成长过程中的屈光变化进行了一项研究。远视并没有减少，但散光的发生率有显著下降。对单眼水平和垂直子午线屈光变化的研究清楚地表明，如果任何一条子午线的初始屈光为近视或小于+2.50 D，则有向正视发展的趋势。高于该水平，屈光或多或少会变为远视。
