LOUISVILLE, Ky. (WDRB) -- On Aug. 21, a total solar eclipse will make parts of Kentucky go dark for up to 2 minutes and 40 seconds.

But if you want to watch, you'll need eclipse glasses to see it safely.

"If you are not protected, and you look directly at the sun, you could go blind," said Mark Lynn, an optometrist at Visionworks. "It's just that simple."

To look at the eclipse safely, you need certified solar eclipse glasses. Luckily, WDRB News has you covered. We've teamed up with Heine Brothers Coffee to give away a free pair of eclipse glasses with any purchase. 

Lynn said the coating on the glasses helps disperse the light so you will not get the burning effect on the back of your eye. Looking at the sun unprotected will damage your eye, and you won't even know it at first.

"There is no pain receptors there," he said. "You don't really know the damage is occurring until you just don't see."

Most of our area, including Louisville, is in the partial eclipse zone. During the partial eclipse, there is never a time when it's safe to look at the sun without eclipse glasses, and not all eclipse glasses are equal.

"WDRB is kind enough to give these out, but they've got an ISO stamp on the inside," Lynn said. "If they don't have an ISO stamp on them, they aren't good. You could go blind with those."

Don't wait to get your free pair of glasses. They're expected to go fast at all Heine Brothers locations. 

And you can join WDRB News for an eclipse watch party at the Kentucky State Fair from 1:30-2:30 p.m.

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