Berlin. It’s not every day that the moon moves in front of the sun – the last time was 18 months ago. It’s that time again on Tuesday afternoon. And maybe you are one of the lucky ones who can observe the natural phenomenon when the sky is clear.
Looking at the sky unprotected is not a good idea. The Federal Office for Radiation Protection (BfS) warns of this. Because the radiation and the light of the sun can damage the retina in the eye. And within a very short time it is so severe that the eyesight suffers permanently. The treacherous thing is that there is no warning signal, because damage to the retina does not hurt.
How to recognize good filter glasses
But how do you protect yourself when you look at the sky? According to the BfS, simply putting sunglasses on your nose is far from enough. And the experts also advise against self-made protective measures such as soot-blackened glasses or black film strips.
It must be special eclipse goggles. You can recognize them by the fact that they are based on the standard DIN EN ISO 12312-2:2015 (“Filter for direct observation of the sun”) are certified.
If you still have glasses in your drawer from previous solar eclipses, they must not have any cracks or damage. Because then the filter in it may not be as effective as it should be.
Cameras and telescopes also need filters
Even those who want to observe the partial solar eclipse through a telescope or camera need protection for their eyes. All the more so because the lenses also focus the sunlight. The advice of the BfS is therefore: Attach suitable filter attachments or foils from specialist shops in front of the lens.