How to Test Blue Light Filter Screen Protector？
To combat the effects of blue light emitted by screens, many turn to blue light screen protectors. But how do you know if a blue light screen protector actually works? In this blog post, we'll guide you through various methods to test the effectiveness of a blue light filter screen protector.
1. Test Using a Blue Light Test Card
One of the easiest and most reliable ways to test the effectiveness of your PerfectSight Blue Light Screen Protector is by using a blue light test card. These cards come with a built-in sensor that changes color when exposed to blue light.
Here's how to use it:
First, ensure that the PerfectSight screen protector is properly applied to your device.
Then, Hold the blue light test card about 1–2 inches (2.5–5 cm) away from your device's screen and observe its reaction. If the card changes color (typically it may turn darker or show a noticeable shift), it indicates that blue light is being emitted from the screen.
If the card remains unchanged or shows minimal change, this suggests that the screen protector is effectively blocking or filtering out the blue light.
To get a clearer idea of the protector’s effectiveness, you can repeat the test without the screen protector (if it's removable). If the test card reacts more intensely without the protector, this confirms that the protector is doing its job in reducing blue light exposure. Take the PERFECTSIGHT brand anti-blue light screen protector as an example:
The following are the effects after and without using the anti-blue light screen protector. It is obvious that the color of the blue light test card without the anti-blue light screen protector changes significantly, while the color of the blue light test card after using it has hardly changed.
2. Personal Comfort Test: Does It Relieve Eye Strain?
A practical and subjective method to test the effectiveness of the PerfectSight Blue Light Screen Protector is through personal experience. After applying the protector, use your device for an extended period, and observe whether it reduces symptoms of eye strain, fatigue, or headaches.
Signs of improvement: If you experience fewer headaches, reduced eye strain, or less blurry vision, it's likely the protector is doing its job.
Signs of no change: If symptoms persist or worsen, you may need to evaluate whether the protector is suitable for your device or if a different solution is needed.
3. Check for Visible Color Changes
Another simple test to assess blue light protection is by checking the screen for any visible color changes. Some blue light screen protectors, including PerfectSight, may slightly alter the screen’s hue, giving it a warmer tone. This is an indicator that the filter is working.
While this color shift is usually subtle, it can be more noticeable in lower lighting conditions. If you notice a warmer or amber tone, it's a good sign that the blue light filter is active.
4. Check User Reviews and Independent Testing
Finally, one of the best ways to test the effectiveness of a screen protector is to check the experiences of other users. Read online reviews, watch video demonstrations, and consult independent tests to understand how well the PerfectSight Blue Light Screen Protector performs.
Many tech enthusiasts and independent reviewers will conduct rigorous tests, including measuring blue light reduction levels with specialized equipment. If you find consistent positive feedback, you can be more confident in the product's effectiveness.
