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With more than 150 million people in the United States (nearly half of the population) requiring some form of corrective eyewear to compensate for visual impairment, chances are you have had your eyesight graded on the 20/20 scale before. If you haven’t, you have probably heard other people saying they have “20/20 vision” or even the phrase “hindsight is 20/20″. The vision scale is so prevalent in Western culture that there’s even a TV news show named after it.
If you’ve ever wondered how animals view the world, this video should satisfy your curiosity. It shows how five different animals — cats, dogs, rats, hawks and bees — see the world.
Optical illusions are fun because you literally can’t believe your eyes. But isn’t it a little troubling that your eyes can get fooled like that? Why don’t they show you the visual truth? How can you ever trust them if they don’t?
Contact lenses are great if your only issue is nearsightedness or farsightedness, but for those struggling with age-related macular degeneration (AMD), a leading cause of blindness among older adults, those flimsy little lenses ain’t going to cut it — or at least not the kind of contact lenses you’re used to. But soon AMD sufferers could see their vision vastly improving thanks to a slim, adjustable telescope that sits right in the middle of their eye.
Here’s a brilliant way to drum up new business if you’re an optometrist. Myung Dong, an eye doctor in Jeju, South Korea, found the perfect way to convince the local elderly population that they could benefit from glasses or other vision treatments: a business card featuring a self-administered eye test.