If you’re anything like most of the modern world, you spend a ton of time in front of a computer. And if you spend a ton of time in front of the computer, you’re probably squinting more than you realize. The problem with squinting is that it often leads to less blinking and thus less moisture for your eyes.
A recent study indicated that narrowing your eyes just slightly reduced eye blinks per minute by 50 percent. More pronounced squinting reduced eye blinks to just four per minute! With so little blinking, your eyes inevitably become red, itchy and irritated.
Squinting also strains the muscles around and behind your eyes, putting them through more aging strain than necessary.
The difficulty is that we evolved to keep our eyes on the distant horizon with only temporary periods where we focused on objects up close.