Except during totality, never look at the Sun without eye protection. When viewing the eclipse, use eclipse glasses or a viewer at all times when any part of the Sun is visible.
Adequate eye protection specifically designed for viewing the Sun is essential and should be worn so that no harmful rays from the Sun can reach the eye.
A total solar eclipse is about as bright as the full Moon — and just as safe to look at. But the Sun at any other time is dangerously bright; view it only through special-purpose “eclipse glasses” or hand-held solar viewers that meet the ISO 12312-2 international standard for such products.
Image Credit: Charlie Bates, courtesy Mark Margolis / Rainbow Symphony