Graphic designers, you should probably stay away from this one. This optical illusion messes with your vision in a way that creates false colours that could linger for over three months - though don't worry, you have to be trying pretty hard to have that pronounced an effect. It's called the McCollough effect, and here is how it works.

Blue light from smartphones might be interfering with your sleep, but there’s no evidence that it’s blinding you, despite ad claims and, occasionally, headlines implying it is.

Having a pet is getting to know their personality and all their quirks, feeling like you can communicate despite not really sharing a language at all. But have you ever thought about how your beloved pet sees you, your house and all the fancy toys you've bought for it to play with? Here's how your pets see the world.

If you've lost your keys, you might think it's best to search in the most obvious, open areas before moving on to more cluttered areas. But a recent study suggests our peripheral vision is better than we think, and being so thorough while searching might actually be a waste of time.

If you're shopping for a new pair of eyeglasses, you may get sticker shock when you pick up a pair of frames at your local optician. It certainly doesn't help that vision insurance doesn't always cover glasses -- and when it does, it may not cover the whole cost. Another option is to take your shopping to the internet, where you'll find a better selection and lower prices.

Gunnar Optiks and Uvex computer glasses both promise to reduce eye strain, prevent computer-related headaches, and be comfortable to wear for long periods of time. But Uvex's basic frames, while not even remotely as visually appealing as the Gunnar line, are a fraction of the cost. Let's see who is victorious in this battle between beauty and the beast.

Two weeks ago I paid to have lasers fired into my eyes. The next day I woke up like Peter Parker, post-spider bite. I couldn't climb walls, but I could see so well I felt like a superhero. For the first time since I was a kid I could open my eyes and just see. My laser eye surgery story isn't quite comic book-worthy, but here's everything that happened, in case you want those powers too.