A red eye, also known as bloodshot eyes, occurs when the tiny blood vessels on the surface of the white part of your eye (sclera) become enlarged. This can happen for various reasons, including:
- Eye dryness: When your eyes don't produce enough tears, they can become irritated, causing the blood vessels to dilate.
- Environmental irritants: Exposure to dry air, wind, dust, smoke, or excessive sun can irritate the eyes, leading to redness.
- Allergic reactions: Allergens such as pollen, pet dander, or dust mites can trigger an allergic reaction in the eyes, causing inflammation and redness.
- Infection: Conjunctivitis, also known as pink eye, is an infection of the conjunctiva, the membrane that covers the white part of the eye and the inside of the eyelid. It can be caused by bacteria, viruses, or allergies.
- Other medical conditions: Red eyes can also be a symptom of more serious conditions like glaucoma, uveitis, or high blood pressure.
If you experience persistent or severe red eyes, it's important to consult an eye doctor to determine the underlying cause and receive appropriate treatment.
