Baby Banz are a necessity to cover infant and toddler eyes from the harmful rays of UV (ultra violet) light. Until approx 8-9 yrs old a child has no filters in the eye to block out UV light. You can actually do MORE harm to the eye if you put an inferior lens in front of the eye! Behind tinted lenses, the iris opens to allow more light into the eye; if the lens doesn’t protect properly, and more UV light gets into the eye potentially damaging the child’s eye.Check out this video on Baby Banz from DadLabs.com for great information on protecting little eyes!