How to Know if Eclipse Glasses Are Safe to Use

The total solar eclipse of 2024 is fast approaching, and if you’re planning to witness this celestial phenomenon, it’s crucial to ensure you have the right eye protection – specifically, eclipse glasses. Here’s a comprehensive guide to help you determine the safety of your eclipse glasses:

The Safety Standard: ISO 12312-2

Genuine eclipse glasses must meet the international safety standard ISO 12312-2. This standard guarantees that the glasses block harmful ultraviolet (UV) and infrared (IR) radiation and reduce visible sunlight to safe levels. Look for the “ISO 12312-2” label on the glasses or their packaging.

Physical Inspection: Check for Damage

Examine your eclipse glasses carefully for any physical damage, such as scratches or punctures. Damaged glasses may not provide adequate protection, so it’s best to avoid using them. Additionally, glasses more than three years old may have degraded over time, so it’s recommended to purchase new ones.

The Brightness Test: Dimness Check

A simple test can help you assess the effectiveness of your eclipse glasses. Put on the glasses and look at a bright light source. If the light appears extremely dim or virtually invisible, your glasses are likely authentic and provide sufficient protection.

Avoid Fake Glasses: Trustworthy Sources

To prevent purchasing counterfeit eclipse glasses, only order from reputable vendors. The American Astronomical Society (AAS) maintains a list of trusted eclipse glasses manufacturers. Avoid marketplaces like Amazon or Temu and refrain from ordering from overseas sellers.

Caution with Homemade Eclipse Viewers

If you’re considering making your own eclipse viewer, it’s essential to follow NASA’s guidelines. An indirect viewing method, such as a pinhole projector, is recommended. Avoid looking directly at the sun, even with homemade viewers, to protect your eyes.

Remember, the total solar eclipse is a rare opportunity to witness a breathtaking celestial event. By taking these precautions to ensure your eclipse glasses are safe, you can enjoy this awe-inspiring phenomenon without putting your eyesight at risk.

also read:Secure Your Solar Eclipse Glasses Now for the April 8, 2024 Celestial Event!