(HealthDay News) — Dry eye affects millions of adults in the United States, says the National Eye Institute.

In a healthy eye, tears keep the surface moist. Without this lubrication, people may feel a stinging, burning or scratchy sensation.

The institute mentions potential causes of dry eye:

• Medications such as antihistamines, antidepressants and decongestants.
• Conditions such as diabetes or rosacea.
• Windy, smoky or dry environments.
• Long periods of screen time.
• Seasonal allergies.

People with symptoms should consult an eye-care professional.

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