eclipse2017 safety measures

Looking directly at the sun is unsafe except during the brief total phase of a solar eclipse (“totality”), when the moon entirely blocks the sun’s bright face, which will happen only within the narrow path of totality.

Read more here : https://www.facebook.com/NASA/?hc_ref=ARS7FUiJGZYzyVtuObtNmnTT8ZmvxinSMa3qGBl1D7MG-JPaE5tCitTJvmiAma1GLDc&fref=nf