Is eye damage an issue for viewing a non-total eclipse? Like 70-80%?
From what I understand, yes.
Even worse, as there is more sunlight to damage your retinas............
I'm an amateur astronomer that specializes in solar observation. If you can see any of the sun's disk, even 1%, you need to wear approved (ISO certified) eclipse glasses or use a #14 welders glass. It's not just the visible light that gets you, it's the UV and IR. Don't risk your eyesight for the sake of saving $2.00 on a pair of glasses.
I'll be in northern Maine where the expected cloud cover is the worst of the entire path.
Is eye damage an issue for viewing a non-total eclipse? Like 70-80%?
YES! You need a safe solar filter to look through. Even a strong welder’s glass will work, but it needs to be very very dark.