Epidemiological studies support a progressive of appropriate complementary feeding that has been shown to guard children from xerophthalmia through the preschool year
Intake of yellow fruit (mango and papaya) is strongly protective in the second and third years of life
Dark green leafy vegetables play a more important role from the third year onwards
After infancy, routine consumption of animal foods with preformed vitamin A (eggs, dairy products, fish and liver) is highly protective