What Are the Causes of Dry Eyes

What Are the Causes of Dry Eyes?

• Computers. If you spend a lot of time looking at computers, you may be at risk of dry eye syndrome. You should try to blink the eyes at least 10 times for every 30 minutes of computer use. Good adherence to this habit can avoid dry eye syndrome.

• Contact lenses. Contact lenses block the normal supply of oxygen to the cornea. You may select lenses with higher gas permeability, such as silicone hydrogel contact lenses or rigid gas-permeable contact lenses, to reduce the problem of dry eyes.

• LASIK. Laser-assisted in-situ keratomileusis (LASIK) eye surgery, which allows one to avoid wearing glasses, is a common cornea refractive surgery to correct vision problems. Dry eye syndrome is a common side effect of LASIK surgery, affecting about 4% of all patients, and is often caused by accidentally damaging the trigeminal nerve during the surgical procedure. The issue of dry eyes could persist for months and even years after surgery.

• Environmental factors. Both indoor and outdoor air pollution can cause dry eye syndrome. Globally, 3 billion households burn coal, wood, charcoal, dried plant stalks, and animal waste for indoor cooking and heating. Exhaust from automobile gasoline and diesel fuels, pollutants released from industrial factors, and particulate matter from air pollution, such as PM2.5 and PM10, are all risk factors for dry eyes.

• Smoking. Cigarette smoke contains harmful chemicals that enter the bloodstream and the eyes and lead to eye injuries. These toxic and irritable chemicals damage the tear film, resulting in the loss of moisture control on the surface of the eyes. These smoke-related chemicals can also irritate the conjunctival mucosa of the eye, induce swelling and inflammation, decrease tear formation, and increase the incidence of dry eyes.