Medication can often influence the eye’s ability to make tears. Antihistamines, decongestants, oral contraceptives, blood pressure medications and antidepressant can all diminish tear production.
Heaters, air conditioning units, and smoke can all cause tears to evaporate quickly, resulting in dry eye symptoms. Computer use is another common culprit of dry eye, since focusing on a screen can prevent people from blinking regularly.
Other Diseases or Disorders
Other illnesses can affect the eye’s ability to produce tears including rheumatoid arthritis, diabetes and thyroid conditions.