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Put them on and look at a bright light. You shouldn't be able to see anything. It's not foolproof, but cheap fake glasses are usually so bad that you can see ho
by burkaman 9y ago
Put them on and look at a bright light. You shouldn't be able to see anything. It's not foolproof, but cheap fake glasses are usually so bad that you can see household lights through them.
You can also see if the brand you have is on this list, although someone could have faked a reputable brand name: https://eclipse.aas.org/resources/solar-filters https://eclipse.aas.org/resources/solar-filters
- klodolph 9y agoIt depends on the light. If you stare directly at a bare LED or filament for an incandescent bulb, you will probably be able to see it.
- MrRadar 9y agoYep, I have a pair of glasses shipped directly from American Paper Optics (so I know they're genuine) and the only things I can see through them (besides the sun) are the bare filament of a 60W incandescent bulb and the LED chip in my phone camera flash.
- hyperpape 9y agoI believe that the method of looking at a bright light is not fully reliable: https://news.ycombinator.com/item?id=15006250 https://news.ycombinator.com/item?id=15006250. I would love to be told I am wrong, since I have four pairs that pass this test without a problem, and I wish I could trust them.
- burkaman 9y agoIt definitely isn't, it's just a good quick check. I don't think there's any easy way of testing UV protection at home.