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Red eye is the presentation of inflammation, which
is the natural reaction of the body tissues to infection, allergic
reactions, physical trauma and burns. Characteristics symptoms of
inflammation are redness, swelling & pain. Due to intimate relationship
between the lid margin and the ocular surface; pathologies affecting
the eyelids are common causes of red eye.
Blepharitis
Generalized inflammation of the eyelid margins, with
symptomatic redness, itching and discharge. It tends to be very
persistent and may cause the eyelashes to fall out or to turn inwards
so they irritate the cornea. Although the symptoms are uncomfortable,
the condition usually is not serious. Blepharitis is probably the
single most common cause of all eye discomfort.
Ectropion
& Entropion
Ectropion is eversion (turning out) of the eyelid. It
can lead to poor tear drainage and excessive exposure of the cornea
due to incomplete lid closure. Infection and damage to the cornea
are more likely to occur.
Entropion is inversion (turning out) of the eyelids so that the
eyelashes rub against the cornea. This can irritate the cornea and
make it more susceptible to infection. Eyelid abnormalities that
may encourage the development of other eye infections, such as conjunctivitis
and Keratitis. They are not infectious conditions on their own.
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