Sir Isaac Newton would actually wait in a dark room so that his pupils would dilate before using a mirror to look at the sun. He wanted to see if this would create any weird or interesting visual phenomena. Instead, he developed photophobia, the phobia of sunlight. And that's not the only dangerous thing that could happen after staring directly into the sun. For example, the UV light from the sun can give you photokeratitis, which is basically sunburn on your cornea. It can cause blisters and inflammation. It is unsafe to look at the sun even through sunglasses and camera filters, and especially not through telescopes or binoculars.
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Key Facts In This Video
Isaac Newton developed a phobia of sunlight after staring into the sun too many times. 00:31
Staring at the sun can give you photokeratitis, which is sunburn on your cornea. 01:06
It is unsafe to look at the sun through sunglasses and camera filters, and is especially dangerous to look at it through telescopes or binoculars. 02:44