GUNNAR computer glasses for kids come with Blue Light Protection Factor™ (BLPF). Just how Sun Protection Factor (SPF) measures protection for the skin, the BLPF scale measures lens protection for the eye. The higher the number, the better. Read more about GUNNAR BLPF-options here. GUNNAR computer glasses for kids come with Natural Focus (diopter of 0) in age groups 4-8, 8-12 and 12+.
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