Remember the following 4 criteria:
1. Can block 99% or 100% of UV rays, including UVA and UVB.
Wearing sunglasses for children is to block ultraviolet rays. This standard is naturally a hard lever. UVA is long-wave UV, UVB is medium-wave UV, both must be protected, the American Academy of Pediatrics recommends that children's sunglasses block the ability to at least 99% (preferably block 100%).
For regular brands, the standard will be indicated on the packaging. If you choose to mark “100% UV” or “UV400”, the three products are definitely not available.
2, the material of the glasses should be anti-fall and safe.
Parents know what happens when an item arrives in the child's hand: smashing, tearing, twisting, smashing... The older child runs and jumps, climbs up and down, does not stop, the adult wears Metal glass glasses dare to wear baby? In case the glass breaks and scratches the baby and is even swallowed, it feels terrible to think about it.
A pair of professional children's glasses, the lens can not be glass, to use a sufficiently safe material, wear-resistant and fall-resistant; the frame must also have sufficient toughness, can be twisted at will, and there is no small attachment that is easy to fall off.
I personally don't like the kind of very fancy sunglasses. In particular, some of them are also equipped with rhinestones. They are easy to fall off and are swallowed by children. It is very unsafe. After all, UV protection and safety are the first, and they cannot be misplaced.
3, the lens will not distort the imaging
Parents first look through the lenses to check if the objects are normal.
The specific inspection method is: hold the sunglasses, straighten the arm, look at the straight line or right angle through the lens, such as the door frame, floor line, etc., slowly move the sunglasses, move up and down in all directions, if the lines are twisted or skewed , indicating that the lens is not qualified.
4, through the EU CE certification or other authoritative certification.
Sunglasses have strict industry standards: China's standard QB 2457-1999, international standard ISO 12312, Australia AS/NZS, US ANSI Z80.3-2001.