Except during the brief total phase of a total solar eclipse, when the Moon completely blocks the Sun’s bright face, it is not safe to look directly at the Sun without specialized eye protection for solar viewing. Viewing any part of the bright Sun through a camera lens, binoculars, or a telescope without a special-purpose solar filter secured over the front of the optics will instantly cause severe eye injury.

When watching the partial phases of the solar eclipse directly with your eyes, which happens before and after totality, you must look through safe solar viewing glasses (“eclipse glasses”) or a safe handheld solar viewer at all times. You can also use an indirect viewing method, such as a pinhole projector.​

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People wearing eclipse glasses look up at sun Employees and visitors at NASA's Jet Propulsion Laboratory stopped to watch the 2017 solar eclipse on Aug. 21, 2017. Credits: NASA/Josh Krohn

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