THE FACTS

Take it from Anderson Cooper: Always wear shades.

Last week, Mr. Cooper, a CNN anchor, described an unusual experience that left him temporarily blind. On an overcast day, Mr. Cooper, sans sunglasses, was filming a news segment on the water off the coast of Portugal. That night, he woke up feeling ???like my eyes are on fire.???

???I douse my eyes with water,??? he said. ???It turns out I have sunburned my eyeballs, and I go blind. I went blind for about 36 hours.???