On Monday, August 21, a total eclipse of the sun will be visible in parts of the continental U.S. for the first time in almost 40 years as the moon completely covers it—and observers in all states will experience at least a partial eclipse.
Because this phenomenon is so rare—the next total eclipse won’t occur in the U.S. until 2024—Americans across the country are clamoring to watch. And there's no reason not to—as long as you do so safely: Even when blocked by the moon, the sun’s rays, both visible and invisible, can cause severe and permanent damage to the eyes.
So before you check out the eclipse, check out this video—featuring safe viewing tips from Johnson & Johnson Vision ultraviolet expert
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