Ask for advice: how to protect your eyes when observing a solar eclipse?

Using special or self-made equipment, it is forbidden to observe the sun directly with naked eyes, so as not to cause harm to eyes. If you observe the solar eclipse with naked eyes, the easiest way is to find a piece of glass, paint it with some ink or smoke it black, and paint the color layer evenly. They should be used to observe the solar eclipse, and the sun is bronzed. You can also overlap several discarded photographic negatives and observe the sun through the negatives (increase or decrease the number of negatives according to the intensity of sunlight), or observe the reflected image of the sun in a basin filled with some ink, and observe the sun through computer cores, welded glass sheets and other items. This can not only achieve the observation effect, but also protect the eyes.

There should be special glasses for observing the solar eclipse these days, a few dollars a pair, not expensive, the landlord can have a look. I bought observation glasses as a supplement for astronomers, and it's a grand view of the eclipse, but it's definitely too late to mail it now.

In addition, it is not allowed to point the unobstructed telescope directly at the sun, otherwise it will burn your eyes and lead to blindness. It is necessary to add filtering equipment to the telescope to observe directly. Photographers can't shoot the sun directly with a camera without filter protection.