Shore Eye Associates

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Every red eye is not "pink eye"

conjunctivitis

There are many things which can cause your eye to become red. 


The eye looks red when the blood vessels that are in the conjunctiva (mucous membrane that covers over the white of your eye and the backside of your eyelids) become dilated.

Those blood vessels often dilate when the eye gets irritated.  This irritation can originate from a problem occurring inside the eye or factors from outside the eye.

The most common external factors that can cause the eye to become red are exposure to infectious organisms (mostly viruses and bacteria), environmental irritants (smoke, chemicals, sunlight), or allergens.

Infectious organisms can cause infectious conjunctivitis or what is more commonly referred to as “pink eye”.  Infectious conjunctivitis often presents with the eye being red and a mucous discharge being produced often to such a degree that the eyelids are crusted closed upon awaking in the morning.  Infectious conjunctivitis can be extremely contagious and it is often advised that you severely limit your exposure to others while the problem is active.  Infectious conjunctivitis caused by bacteria can be treated with antibiotic eye drops but viral conjunctivitis has no treatment currently and just must run its course like the common cold.

Environmental irritants can make the eye red usually for a short period of time during and immediately after exposure.  The irritation is usually self-limited but may resolve more quickly with the use of over the counter lubricating drops or artificial tears.  It is very important to understand exactly to which irritant you were exposed because there are some chemicals (acids and bases) which can cause extreme damage to the eye so if you’re exposed to a caustic chemical you need to emergently rinse your eye out with water and seek emergency medical attention.

Allergens can cause allergic conjunctivitis which can look very similar to pink eye but usually has significantly less mucous discharge and is usually accompanied by fairly severe itching.  Allergic conjunctivitis is not contagious and can usually be treated with anti-allergy eye drops.

Infectious and allergic conjunctivitis can cause mild discomfort and itching but they rarely cause significant pain or loss of vision.  A red eye with significant pain, especially when accompanied by severe light sensitivity and vision loss, often indicates more significant problems such as iritis, angle closure glaucoma or a corneal ulcer all of which require quick medical attention.  If your eye is red and there is significant pain do not assume you have pink eye, see your ophthalmologist or optometrist immediately.

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Thursday, 20 June 2019

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