1. Use approved solar eclipse viewers. Eclipse glasses or viewers meet international standard ISO 12312-2 for safe viewing of a partially eclipsed sun. Sunglasses, smoked glass, unfiltered telescopes, polarizing filters or goggles are unsafe for eclipse viewing. For more information on approved solar eclipse viewers, please visit : https://eclipse2017.nasa.gov/safety.
2. Technique for eclipse viewing is important. Before looking at the sun, cover your eyes with the eclipse viewers while standing still. Always turn away from the sun and then remove the viewers.. Do not remove the filter while looking at the sun.
3. Only when the moon completely blocks the sun can eclipse viewers be safely removed to view the eclipse's totality. Once the sun begins reappearing, viewers must be placed back over the eyes.
4. Visit your optometrist if you should experience any eye discomfort or vision problems following viewing of the eclipse.