What if there are no tools to prepare for the total solar eclipse tomorrow?

Be sure to prepare tools to watch the solar eclipse.

Looking directly at the sun for a long time can cause "solar retinitis", which causes burns to the macula of the retina due to its ultraviolet and infrared rays. It is almost impossible to treat. The macula is the most sensitive part of the retina, where it focuses light and makes images clear. Once burned, the retinal macula will never recover.

You may not feel anything when you are burned, but reactions will occur a few hours later, and in severe cases, you may become blind. When viewing a total solar eclipse, the first thing to note is: Never look directly at the sun with the naked eye or any optical equipment (such as a telescope, etc.).

Extended information:

Precautions for watching the solar eclipse:

1. Sunglasses and sunglasses are not specially designed for observing the solar eclipse and cannot effectively block red/ultraviolet rays. Burning to the naked eye, directly wearing sunglasses or sunglasses to observe the solar eclipse will damage the retina, and because the retina does not feel pain, even if it is burned, it will not be noticed.

2. During a partial solar eclipse, it is very dangerous to observe directly through binoculars, telescopes, or even camera viewfinders. Special filters must be used for visual inspection and photography.

3. It is not advisable to look at the sun for a long time if you have special sun observation glasses. When looking at a partial solar eclipse, look at it for ten seconds at a time, rest for three or four minutes, then continue looking, and try to protect your eyes.

Baidu Encyclopedia - Solar Eclipse

People's Daily Online - Prevent "blindness"! What gear do you need to view the solar eclipse? (Picture)