How Do Solar Eclipse Glasses Work?

In addition to the visible light that we can perceive with our vision, sunlight also contains invisible infrared and ultraviolet rays. Directly observing the sun with the naked eye would also expose our eyes to these infrared and ultraviolet rays. For visible light, we feel it as dazzling, and reflexively blink or close our eyes to protect ourselves from its effects.

During solar eclipse observation with the naked eye, some people may become captivated by its mesmerizing allure and endure the dazzling sensation, forcing themselves to keep looking. As a result, the infrared and ultraviolet rays present in sunlight would also reach the retina through the pupil for an extended period. Even though they are not visible to the eye, infrared and ultraviolet rays still possess the power of light and can have harmful effects on the retina.

The lenses of solar eclipse observation glasses act as filters to attenuate the sunlight, including the invisible infrared and ultraviolet rays. During solar eclipse observation, always make sure to wear solar eclipse observation glasses to protect your eyes.

The lenses of solar eclipse observation glasses reduce the impact of sunlight on the eyes, including invisible ultraviolet and infrared rays.

Without using solar eclipse observation lenses, harmful ultraviolet, infrared, and sunlight rays can reach the eyes, causing damage to the eyes.

The sun emits intense light and heat. During a partial solar eclipse, a portion of the sun is obscured by the moon, yet the strength of the light and heat remains unaltered. Without proper precautions, there exists a risk of harming the eyes, and in the most severe scenarios, even causing blindness.

The following actions should never be done as they can cause eye damage:

Looking directly at the sun with the naked eye (even for a few seconds) is dangerous.

Using telescopes or binoculars (※1).


Using film scraps (※2).

Using a glass plate with soot applied.

Using sunglasses or goggles.

Using solar eclipse glasses to observe through telescopes or binoculars.

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