Dry Eye
Major causes:
- Vitamin A deficiency
- Lack of fuild intake
- After sun exposure
- Aging factor  
- Environmental factors
- Medications factors
 
Signs and Symptoms:
- Dry eye feeling
- Blurred vision
- Itchy, redness and burning sensation in the eyes
- Vision keep changing all the long, specifically with reading
- Lack of tear fluid production to properly lubricate the tear film
 
Diagnosis:
- A comprehensive eye exam
- Measure the volume of eye tears
- Mearsure quality of tears
 
Complications:
- Eye infections
- Damage to the surface of the eyes
- Decrease quality of life
 
Prevention:
- Avoid air blowing to the eyes
- Add moisture to the air
- Stop smoking and avoid smoke
- Use artificial tears