Flushing occurs when blood vessels near the surface of the eye become enlarged and dilated. If you have red eyes, it is important to find out why. The red eyes have many causes. Sometimes the cause of red eye is of little interest, but can also be a sign of a medical emergency. It is always best to seek the advice of a medical professional.
Top 10 causes of the red eyes
1. Conjunctivitis or pinkeye, is an inflammation or infection of the transparent protective layer covering the front of the eye. Conjunctivitis can be caused by allergies, bacteria, viruses or toxic substances.
2. Uveitis is an inflammation of the uvea of the eye. It can cause redness, pain, blurred vision, sensitivity to light and floats. Uveitis should be treated quickly, because other complications such as glaucoma or uveitis and retinal scars choriodal may occur if he persists.
3. Dry Eye. Human tears according to lubricate, nourish and protect the surface of the eye. When tears are not of good quality or quantity, the surface of dry eye. Causes chronic dry eye area to swell and dilate blood vessels as a result, causing increased redness.
4. Blepharitis. Blepharitis is a chronic infection and inflammation of the eyelids and eyelashes. Blepharitis may be caused by poor eyelid hygiene. Other causes include fat glands of the eyelid, allergic reactions, bacterial infections, or lice on the eyelashes.
5. Acute angle-closure glaucoma. Unlike most types of glaucoma, acute angle-closure glaucoma causes several recognizable signs, including redness, pain that usually occurs in one eye. Acute angle-closure glaucoma is a serious medical emergency and must be treated immediately.
6. Subconjunctival Hemmorage. A subconjunctival hemmorage is caused by a blood vessel bursts. When they break, these vessels bleed and extend beneath the conjunctiva, the transparent layer on the surface of the eye. It can be caused by hard sneeze, cough, intense effort, vomiting, trauma, high blood pressure, diabetes and sometimes certain blood disorder problems.
7. Injury. When an injured eye, blood vessels enlarge and expand to the cells to heal and repair the damage. This will cause the redness.
8. Corneal ulcer or infection. The cornea is a clear structure, dome-shaped eye that helps to achieve clear vision. The cornea has no blood vessels of their own. When the cornea is infected, however, about the blood vessels are enlarged, so that the immune system cells to help fight infection. This redness is very easy to see.
9. Contact Lens Wear. In some individuals, the use of contact lenses every day (or for long periods of time) can cause the eyes to appear red. Some people develop contact lens induced dry eyes, which makes it difficult to wear contact lenses comfortably. In others, merely to have a foreign body such as a contact lens in the eye causes redness.
10. Frequent use of eye drops. The constant use of one of the widely available “get the red” (Visine) eye drops can cause dilation of blood vessels in the eyes. After the effect of eye drops away, the blood vessels dilate, sometimes larger, causing the bloodshot eyes to appear more.