If you’re planning to gaze at the sky during the solar eclipse on April 8, experts recommend you use specialized eyewear made to protect your retinas.

Skygazers planning to look at the eclipse through a camera lens or binoculars still need adequate eye protection. Without proper precaution, the sun’s rays can burn your retinas and cause severe eye injury.

Here are some tips on how to find eclipse eyewear, from USA TODAY.

Often designed with polyester film coated and coated in aluminum, certified eclipse eyewear is designed to block all visible, and infrared light. Solar eclipse glasses must be from an approved vendor the American Astronomical Society maintains a curated list of approved vendors.

On Monday, April 8, a total solar eclipse will cross North America, passing over Mexico, the United States, and Canada. The eclipse will begin over the South Pacific Ocean.

Where to find solar eclipse glasses:

Eclipse websites like American Paper Optics, GreatAmericanEclipse.com and NationalEclipse.com sell a variety of eyewear products. Amazon also sells eclipse glasses in bulk. The American Astronomical Society maintains a curated list of approved vendors. Libraries also offer eclipse glasses.

If you have a Warby Parker store near you, you can pick up a free pair of glasses to see the eclipse. The ISO-certified classes will be given away at all Warby Parker stores through April 1 or while supplies last. If you don’t have a store near you, you can go here to see directions on printing your own pinhole projector that will let you see the eclipse safely.