Why do more children wear glasses in the upper elementary grades than the lower ones?

1.Vision problems are often not noticed until children fall behind academically.

2.Children's diets generally don't contain adequate amounts of fruits and vegetables.

3.Children's eyesight often worsens as their eyes grow.

4.Children eventually develop poor habits like holding their books too close to their faces.

1.Vison problems are often not noticed until children fall behind academically.