What Causes Red Eyes?

Causes of Red Eyes

Red eyes can occur due to various reasons, including:

  1. Conjunctivitis: Also known as pink eye, conjunctivitis is inflammation of the conjunctiva, the clear tissue covering the white part of the eye and the inner surface of the eyelids. It can be caused by viral or bacterial infections, allergies, or irritants, leading to redness, itching, discharge, and tearing.
  2. Dry eyes: Insufficient production of tears or poor tear quality can result in dry eyes, causing redness, a gritty sensation, and discomfort. Environmental factors, prolonged screen time, certain medications, or underlying medical conditions can contribute to dry eyes.
  3. Eye strain: Prolonged use of digital devices, reading for extended periods, or other activities that require intense focus can strain the eyes and lead to redness, fatigue, and dryness.
  4. Allergies: Allergic reactions to substances such as pollen, pet dander, dust mites, or certain chemicals can cause red, itchy eyes. This condition is known as allergic conjunctivitis.
  5. Eye infections: Infections of the eye, including viral or bacterial infections, can lead to redness, swelling, and discharge. Conditions such as blepharitis (inflammation of the eyelid margins) or keratitis (inflammation of the cornea) can cause red eyes.
  6. Eye injuries or trauma: Any injury or trauma to the eye, such as a scratch, foreign object, or impact, can result in redness and inflammation.
  7. Contact lens-related issues: Improper use, poor hygiene, or an allergic reaction to contact lens solutions can cause redness, irritation, or infection in the eyes.
  8. Environmental factors: Exposure to smoke, chemicals, dust, or other environmental irritants can lead to redness and irritation of the eyes.
  9. Ocular rosacea: Rosacea, a chronic skin condition characterized by facial redness and flushing, can also affect the eyes, leading to redness, dryness, and irritation.
  10. Subconjunctival hemorrhage: A subconjunctival hemorrhage occurs when a blood vessel in the eye ruptures, causing blood to pool under the conjunctiva. This can result in a bright red patch on the white of the eye, although it typically does not cause pain or vision changes.

If you experience persistent or severe redness in your eyes, along with other concerning symptoms such as pain, discharge, changes in vision, or sensitivity to light, it is advisable to seek medical attention from an eye care professional for a proper evaluation and appropriate treatment.

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