Once you select frames that you like for your child, the main consideration will be the lenses. Children's lenses should be made of allyl resin (CR-39) and polycarbonate because they are impact-resistant materials .CR-39 is durable and less scratch-resistant.Though polycarbonate is an extremely impact-resistant material, it can be easily scratched if not protected with a surface coating.
In addition to being the safest materials,CR-39 and polycarbonate also are lighter in weight than regular plastic lenses.
The material to avoid is glass. Although it must be treated for impact resistance, glass still shatters when it breaks, and broken glass — even safety glass — is a hazard to the eye. Glass lenses are also a little heavier, which makes them less comfortable to wear.
No matter the style or type of frame , it's important for children to feel that they are a part of the selection process. Choosing frames they like goes a long way toward getting them to wear their glasses regularly and maintaining them too.
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