How to Identify Blue Light Filtering Glasses?

With the widespread use of electronic devices, blue light-filtering glasses have gained significant attention. However, the market offers various types of blue light-filtering glasses, making it challenging to determine their authenticity. In this article, we will share simple methods to help you recognize glasses with blue light filtering capabilities.

Understanding Blue Light Filtering Glasses

Before we delve into identifying lenses with blue light filtering properties, let's grasp their technical principles. These glasses primarily employ two technologies: substrate absorption and film reflection.

• Substrate Absorption

By integrating anti-blue light components into the lens's base layer, this technology effectively absorbs harmful blue light. It ensures lens transparency and clarity without distorting or blurring vision.

• Film Reflection

This technique involves coating the lens surface with an optical film. Through the coherent interference principle, the film reflects back the detrimental blue light. However, regular wear and tear or improper use may cause the film layer to peel off, rendering the filtering effect ineffective.

NextPair's blue light filtering lenses leverage both the base film technology and a special process that coats the surface with a blue film. This blue film not only reduces surface reflection and relieves eye discomfort but also possesses anti-scratch and anti-static dust particle properties. Consequently, the lenses remain clean and durable, providing an exceptional experience whether using electronic devices extensively or spending time outdoors.

Identifying Blue Light Filtering Glasses

Now that we comprehend the principles of anti-blue light glasses, let's explore methods to identify glasses with blue light filtering capabilities. Consider the following techniques:

• Spectrometer Test Method

While the spectrometer is primarily used in labs, it offers the most accurate test for blue light filtering glasses. It measures the wavelength and intensity of light, determining the glasses' efficiency in filtering different wavelengths. High-quality anti-blue light glasses typically block around 60 to 70 percent of blue light, closely resembling the blue light component of sunlight and ensuring optimal eye comfort.

• Naked Eye Test Method

Perform a simple test by placing the lens on white paper and observing the color difference. A light yellow tint indicates a blue light filtering lens. The key distinction between regular lenses and blue light-filtered lenses lies in the coating. Even with advanced lens production techniques, blue light-filtered lenses exhibit a faint yellow hue on their surface.

However, instead of finding various ways to test whether your lenses have blue light filtering features, you should buy from a trusted eyewear brand like NextPair. All NextPair lenses are manufactured in Essilor's factories, guaranteeing safety and reliability.

Summary

Selecting suitable eyewear for you is a very important decision, especially when it comes to blue light filtering features. By employing the aforementioned methods, we aim to assist you in better determining whether your glasses have a blue light filtering function to protect your eyes from blue light radiation.