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Pink eye, the common
name for conjunctivitis, is an inflammation or infection of
the conjunctiva, the outer, normally clear covering of the sclera,
the white part of the eye. The eye appears pink in conjunctivitis
because the blood vessels are dilated. Pink eye is often accompanied
by a discharge, but vision is usually normal, and discomfort
is mild. |
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| Either a bacterial
or a viral infection may cause conjunctivitis. Viruses, which
are more common and last several weeks, may cause an upper respiratory
infection (or cold) at the same time. Unlike viruses, bacterial
conjunctivitis is treated with a variety of antibiotic eye drops
or ointments, which usually cure the infection in a day or two. |
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| Conjunctivitis
can be very contagious. People who have it should not share
towels or pillowcases and should wash their hands frequently.
They may need to stay home from school or work and should stay
out of swimming pools. |
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Not everyone
with conjunctivitis has an infection. Allergies can cause conjunctivitis
too. Typically, people with allergic conjunctivitis have itchy
eyes, especially in spring and fall. Eyedrops to control itching
are used to treat allergic conjunctivitis. It is important not
to use medications that contain steroids (they usually end in
"-one" or "-dex") unless prescribed by an ophthalmologist. Finally,
not everyone with pink eye has conjunctivitis. Sometimes more
serious diseases, such as infections, damage to the cornea,
very severe glaucoma, or inflammation on the inside of the eye
cause the conjunctiva to become inflamed and pink. Vision is
usually normal if the pink eye is really conjunctivitis. If
vision is affected, or if the problem does not get better in
a few days, see an ophthalmologist.
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| Herpes simplex is a common virus
that nearly everyone is exposed to during early childhood. The
virus is transmitted through bodily fluids, such as saliva.
The primary infection is generally mild causing a sore throat
or mouth. After exposure, herpes simplex lies dormant in the
nerves that support the eye and skin. Later in life, the virus
may be reactivated by trauma, stress, running a fever, sunlight,
heat, and certain medications. Herpes simplex is more likely
to occur in immune suppressed individuals. If the virus is triggered
repeatedly, it can become chronic. |
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| Type 1 herpes
simplex, which causes cold sores or fever blisters, can affect
the eyelids, conjunctiva (the outer, clear covering of the sclera,
the white part of the eye), and the cornea. Frequently the first
symptom of the eye being affected by herpes simplex is keratitis
(swelling caused by infection) of the cornea. In some cases,
the infection spreads to the inner layers of the cornea and
may cause inflammation of other eye tissue or uveitis. With
increased swelling or inflammation, the possibility increases
for permanent scarring. |
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| Herpes simplex
symptoms affecting the eyes are pain, red eyes, tearing, light
sensitivity, irritation, scratchiness and decreased vision.
An ophthalmologist can determine through evaluation the extent
of infection and affects to the eyes. |
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An initial
infection is typically treated with topical or oral anti-viral
medication. If the outbreak is more severe, an ophthalmologist
may gently scrape the affected area of the cornea to remove
diseased cells. Permanent scarring caused by chronic, severe
infections may need a corneal transplant to restore vision.
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One's first encounter
with the herpes zoster virus is usually childhood chicken pox.
Later in life, the virus may reactivate, causing a characteristic
rash of small blisters, frequently on the chest or forehead,
which form crusts and may leave scars. This second encounter
is known as shingles. |
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| Unlike chicken
pox, this condition is usually quite painful. Although this
disease often occurs in normal, healthy people, it occurs more
frequently in elderly or immune-compromised individuals. |
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It is important
to see an ophthalmologist when herpes zoster occurs on the face
because the virus may invade the eye. An ophthalmologist looks
for elevated pressure in the eye, inflammation, and herpes zoster
lesions on the surface of the eye. All these problems can be
treated but they are sometimes difficult to manage. Therefore,
careful treatment and follow-up are required. New oral anti-
viral medications are providing sufferers with a quicker, more
complete recovery.
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