Myopia1 12.7% and 19.6% (Spherical Equivalent at least - 0.50 diopters), hyperopia 0.4% and 0.2% (SE at least + 2 diopters), astigmatism 11.2% and 9.6% (SE at least 0.75 diopters) and anisometropia 2.0% and 3.3% (SE difference at least 1diopters).