Amazon is offering refunds after selling fake eclipse glasses — here's how to tell if yours are safe

eclipse glasses

(Looking directly at the solar eclipse can cause eye damage — even if you're a dog.Pablo Blazquez Dominguez / Stringer)

Amazon is pulling eclipse glasses listings and issuing refunds after sellers allegedly offered products that aren't safe.

As supplies of the glasses run short, some customers are turning to knockoffs that don't offer the protection from damage that the space event can cause. The real glasses have very dark lenses, designed for viewing the space event.

The knockoffs often don't meet industry standards, according to the American Astronomical Society (AAS) and NASA, which have put out a list of brands that are deemed safe.

"It's a bunch of unscrupulous people cashing in on the eclipse and putting public safety at risk," Richard Fienberg, press officer for the American Astronomical Society (AAS), told Reuters.

Amazon said in a statement on August 13 it is contacting customers that may have bought knockoff glasses from the site and is offering refund "out of an abundance of caution." The statement notes that all eclipse glasses sold on the website are required to comply with the industry standards for safety. The company also removed some listings for glasses, but did not specify which brands.

To make sure that the glasses you're planning on using or buying complies with the standards set out by the organizations, check if they're one of the approved brands below. The AAS also stated not to pay much attention to the ISO seal stamp meant to authenticate the glasses as real, as some knockoffs have the stamp as well.

These are the safe eclipse glasses brands that you should be buying:

• American Paper Optics (Eclipser) / EclipseGlasses.com / 3dglassesonline.com

• APM Telescopes (Sunfilter Glasses)

• Baader Planetarium (AstroSolar Silver/Gold Film) (The AAS notes that Baader Planetarium's AstroSolar Safety Film and AstroSolar Photo Film is not meant to be used in an eclipse.)

• Celestron (EclipSmart Glasses & Viewers)

• DayStar (Solar Glasses)

• Explore Scientific (Solar Eclipse Sun Catcher Glasses)

• Lunt Solar Systems (SUNsafe SUNglasses), as well as kid-size eclipse glasses.

• Meade Instruments (EclipseView Glasses & Viewers)

• Rainbow Symphony (Eclipse Shades)

• Seymour Solar (Helios Glasses)

• Thousand Oaks Optical (Silver-Black Polymer & SolarLite)

• TSE 17 (Solar Filter Foil)

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