How to see the total solar eclipse to protect your eyes?

Only when the sun is completely blocked by the moon can you watch the total solar eclipse safely without protective measures. When the sun reappears and produces a diamond ring effect, you have to take your eyes off the sun. The total solar eclipse will last about 2 minutes, depending on your observation position. However, for most people, they can only see a partial solar eclipse. At this time, although it is dark, it is not safe to watch the sun in a hurry without proper protective equipment and viewing technology.

The only safe way to watch the partial solar eclipse is to watch it indirectly.

Most health experts recommend using a simple pinhole viewer. You can make a cardboard box or two pieces of cardboard, poke a small hole in one piece of cardboard, hold this cardboard with your back to the sun, let the sun pass through this small hole and project the reflection on the other piece of cardboard. Never look at the sun through this small hole.

Watch the eclipse directly

Many eclipse observers want to watch the partial solar eclipse directly. Professional solar eclipse observers use polyester plastic or dark black polymer plastic coated with aluminum film as filters, but they must be used correctly to ensure safety. The filter element marked "CE" is safer. If you want to choose a filter to watch the eclipse, you'd better follow the advice of the manufacturer. Welder's goggles with shadow index 12, 13 and 14 are also acceptable.

Do not use dangerous alternative filters.

Materials that cannot be used as solar filters include sunglasses, photographic neutral density filters, smoky glass, polarizing filters, records, floppy disks, black films and any black-and-white films that do not image.