The total solar eclipse on April 8, 2024, visible across North America, is the last one in the continental US for almost 20 years. To view the eclipse safely, you will need solar eclipse glasses that block out the most dangerous parts of the solar spectrum for human eyes. These glasses will make the sun appear as an easy-to-view yellow-orange circle, but it is essential to remember that they block out all light, so they should not be used for activities like walking or driving. If you need solar eclipse glasses, Warby Parker is giving them away for free starting April 1. However, it is crucial to ensure that your glasses are legitimate and actually provide protection for your eyes.
One way to verify the authenticity of your eclipse glasses is to check the ISO number on them. A real and safe pair of solar eclipse glasses should be labeled with ISO 12312-2, an international safety standard that indicates the glasses reduce visible sunlight to safe levels and block UV and IR radiation. To further confirm the credibility of your glasses, you can check if the vendor from whom you purchased them is listed as a reputable vendor by the American Astronomical Society (AAS). Choosing a vendor from the AAS list ensures that you are getting genuine and safe eclipse glasses.
The AAS has compiled a list of reputable vendors of solar filters and viewers, which includes big-box retailers and chains where you can purchase AAS approved eclipse glasses. These vendors have earned their ISO ratings through proper lab-based testing, and the AAS has verified their authenticity. If your vendor is not on the list, it does not necessarily mean they are selling counterfeits, but performing an eye test can help you determine if your glasses are safe to use. By checking how the glasses block light when looking at reflected sunlight or bright artificial light, you can ensure that they are dark enough to protect your eyes during the eclipse.
It is important that when wearing solar eclipse glasses, the sun should appear comfortably bright, like the full moon, and should be the only thing visible through the glasses. If the glasses make the sun too dim or uncomfortable to view, they may not provide adequate protection. Conducting a simple eye test using reflected sunlight or bright artificial light can help you determine the effectiveness of your eclipse glasses. Remember that it is essential to use certified and legitimate solar eclipse glasses to safeguard your eyes during the eclipse.
In conclusion, to safely view the total solar eclipse on April 8, 2024, ensure that you have genuine solar eclipse glasses that meet the ISO 12312-2 safety standard. Check the list of reputable vendors provided by the AAS to purchase authentic glasses, and perform an eye test to verify their effectiveness. By taking these precautions, you can enjoy the spectacular event without risking eye damage from harmful solar radiation. Make sure to follow all guidelines and recommendations for eclipse viewing to have a memorable and safe experience.
