Rubbing Your Eyes
You probably won't be struck blind from trying to dislodge a stray eyelash or dust particle, but if you're a regular rubber, there's a reason to break the habit. Keep your hands away from your face, and use artificial tears or just tap water to flush out irritants.
Using Anti-Redness Eye Drops
If you are habituated of using anti-redness eye drops, it is time to become aware of its consequences. These drops work by constricting blood vessels in the eye to reduce the appearance of redness. They would certainly not hurt you but if you use them daily, your eyes essentially become addicted to the drops. Eventually, you will start to need more and the effects will last for less time. And while the rebound redness itself isn't necessarily harmful, it may distract from whatever was triggering the irritation to begin with.
Showering in Your Contact Lenses
Water from the faucet, the pool, the rain, all of them has amoeba that gets on your contacts, which can transfer to your eye. The amoeba can eat away at your cornea, ultimately leading to blindness. If you leave your lenses in to shower or swim, it is better to disinfect or toss them and put in a new pair after getting out of the water. Also remember not to use the tap water to rinse your lenses or their case.
Sleeping in Your Contact Lenses
Sleeping in contact lenses increases your risk of infection between five and 10 times. Sleeping in your lenses can make the germs that do find their way onto your contacts held against your eye for longer, making them more likely to cause problems. This happens due to decreased airflow that comes with long-term contact wear also reduces the eye's ability to fight infection. There's no shortcut here-just stash your lens case and contact solution somewhere you'll see it before turning in to encourage you to go to bed bare-eyed.
Not Replacing Your Lenses as Recommended
If you wear daily-use lenses, replace them daily. If they're monthly, switch monthly. "I'm always surprised by how many people say they only switch to new lenses when their old pair starts bothering them," says Steinemann. "Even if you're fastidious about disinfecting solution, the lenses act like a magnet for germs and dirt," he explains. Over time, your contacts will become coated with germs from your hands and your contacts case, and if you keep wearing them, those bugs will transfer to your eye, increasing your risk of infection. Disinfect your lenses and their case between each use, and toss the lenses as directed (you should replace your case every three months too).