Our eyesight changes over the years. Before the age of 10, children's eye lenses do not fully play their role as filters and allow more blue-violet light to pass through, and even 1-2% of UVA light. Children's antioxidant defences are also less important, as their eyes are not yet mature. It should be noted that our lenses that filter blue-violet light are transparent (they only partially, but significantly, filter blue-violet light) with a neutral tint and selectively filter the light: they let through the part of the light that is essential for children's visual and non-visual development.