NASA shares its eclipse viewing tips. Let me start. Don’t stare directly at the sun with the naked eye…unless you are already used to doing that.



Eclipse viewing glasses and handheld solar viewers should meet all the following criteria:

Have certification information with a designated ISO 12312-2 international standard

Have the manufacturer’s name and address printed somewhere on the product

Not be used if they are older than three years, or have scratched or wrinkled lenses

Not use homemade filters

Ordinary sunglasses — even very dark ones — should not be used as a replacement for eclipse viewing glasses or handheld solar viewers

Discussion

Source: [H]ardOCP – NASA Recommends Safety Tips to View the August Solar Eclipse