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Will we need to wear the special glasses all day or just during that…

Will we need to wear the special glasses all day or just during that 2 hour window where viewing is happening?

Deffinelty do not wear them while driving or walking around as you can’t see anything out of them (they are very very dark). But while you are driving and walking you shouldn’t be looking at the Sun anyway. You only need to wear them while you are looking at the Sun. You can use them any day to view the Sun. In a few years, when the Sun once again becomes more active, you can use these glasses and pinhole projectors to see sunspots! Make sure to check that they are ISO 12312-2 compliant, from a trusted vendor, and not scratched or damaged before using them to look at the Sun. https://eclipse2017.nasa.gov/safety 

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