Search engine optimization — SEO — may seem like alchemy to the uninitiated. But there is a science to it. Search engines reward pages with the right combination of ranking factors, or “signals.” SEO is about ensuring your content generates the right type of signals.
From sore eyes and blurred vision to headaches, doctors have a catch-all term for any screen-induced discomfort: “Computer vision syndrome,” says Dr. Joshua Dunaief, an ophthalmologist and macular degeneration researcher at the University of Pennsylvania. Dunaief says the specific causes of computer vision syndrome (CVS) are numerous, from improper reading glasses to an overly bright screen. But in most cases, any eye issues you’re experiencing stem from two root issues. Either your eyes are dried out, or they’ve become too fatigued to see properly.
“There are tiny muscles inside your eyeball that change the shape of your eye’s lens in order to bring whatever you’re seeing into focus,” Dunaief explains. After hours of sitting in front of your computer screen, those muscles can grow tired from focusing on a single fixed point. “In some cases, those muscles become so fatigued that your eyes can no longer focus,” Dunaief adds. He…
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An eye doctor says he’s recently seen a few 35-year-old patients whose lenses, which are typically clear all the way up until around age 40, are so cloudy they resemble 75-year-olds’. A sleep doctor says kids as young as toddlers are suffering from chronic insomnia, which in turn affects their behavior and performance at school and daycare. A scientist finds that women who work night shifts are twice as likely to develop breast cancer than those who sleep at night.
What do all these anecdotes have in common? Nighttime exposure to the blue light emanating from our screens.
You’ve probably heard the hype these past few years: being in the presence of light at night disrupts the body’s natural circadian rhythms by suppressing the production of melatonin, a sleep hormone. But melatonin does far more than help us get sleepy – it’s also an antioxidant that appears to play a…
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It’s safe to say that if you’re reading this, you probably use Google in some way, shape, or form. Google has expanded from being just a search engine to a full suite of online services. It’s a shame then that many people have no idea just what they can do with Google.
Here’s a hint: It’s a lot more than just searching for stuff.
1. Reverse Image Search
Have an image but don’t know where it came from? You can drag and drop your image straight onto Google’s image search for it to do a reverse search for you.
By doing this, Google will give you any other site that uses the same image, as well as visually similar images. This is useful to check if anyone else is using your images without permission or to check where a certain photo was taken.
2. Scientific Calculator
Need a quick calculation…
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