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The numbers used to measure vision are probably some of the most recognizable in the world. 20/20 has become shorthand for seeing things clearly, not just physically but metaphorically, too. But what do those numbers actually mean?

It was 1940, and the German Luftwaffe was making regular air raids on the United Kingdom. Although the British Royal Air Force was successful in shooting down many German planes, blackouts were still in effect across the country to minimize the visibility of targets on the ground. But don’t worry, the British government said. If you eat carrots, they’ll help you see in the dark, just like they did for RAF Flight Lieutenant John “Cat’s Eyes” Cunningham. Cunningham was responsible for shooting down 20 German aircraft, and it was attributed to his love of carrots. The only problem with that? The British government made it up.

CEENTA has been at the forefront of ear tube treatment since introducing ear tube surgery in 1952, and is maintaining that leadership position with its role in researching a new balloon treatment.

CEENTA is offering a new lens for cataract surgery patients that provides near, intermediate, and far vision.

Nosebleeds are fairly common, with one in every seven people developing one in their lives. What causes them, and how do you stop them?

It happens to everyone: you’re driving down the road on a sunny day when you turn at just the right angle and suddenly the sun’s glare is blinding you. Glare can be a nuisance at best and an accident-causing danger at worst. Luckily, there are ways to minimize it.