The test card is designed to assess the effectiveness of UV light glasses in blocking blue light, helping users determine if their eyewear provides adequate protection for eye health.
Simply place the test card under the glasses you want to evaluate. Look for any visible changes or patterns on the card that indicate the glasses' ability to block blue light.
If the test card shows significant color changes or patterns when viewed through the glasses, it indicates that the glasses effectively block blue light. Minimal changes suggest less effectiveness.
It’s a good idea to test your glasses periodically, especially if you notice any changes in your vision or if you get new glasses to ensure they provide the desired level of blue light protection.
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