Your environment is dry
Dry air, whether it’s indoors or outdoors, can aggravate your eyes. People who live in dry climates are more prone to developing dry eye, as are people at high altitudes.
One study found that only 9% of participants at a lower altitude (about 700 feet above sea level) reported having dry eye while 20% of those at a higher altitude (more than 10,000 feet above sea level) said they suffered from the condition.
Dry indoor environments can have the same effect. This includes anywhere with air conditioning or heat, hospital environments, airplanes and many work environments.
Other environmental irritants include wind, smoke, fumes from chemicals, and sunlight.
