What is chronic blepharitis?
Chronic blepharitis is a common eyelid inflammation that affects the edges of the eyelids. Blepharitis usually involves both eyes and occurs when the oil glands near the base of the eyelashes become blocked, causing irritation and redness. The condition can be caused by a number of diseases and conditions such as certain skin diseases, infection or a combination. It is often a chronic disease that is difficult to treat, that worsens at times and can cause a decrease in vision, but usually there is no serious and irreversible damage to the vision, and it is not contagious.
The main symptoms of blepharitis are an itchy sensation in the eyelids, redness in the eyes, tearing, a kind of scaling and peeling at the base of the eyelashes, a burning or stinging sensation in the eyes, Dryness , hypersensitivity to light (photophobia) and a feeling of discomfort like a foreign body in the eye. Symptoms are often more significant in the morningC
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What types of blepharitis are there?
Anterior eyelid inflammation
Usually caused by bacteria (such as staphylococcus) or by dandruff from the scalp and eyebrows (seborrhoea). These bacteria are naturally found on the face and eyelids, but when their quantity is increased or when the body's reaction to them is intensified, inflammation or infection may appear. Less commonly, an allergic reaction or mite infestation of the eyelashes can cause anterior blepharitis.
Posterior blepharitis
Can occur when the sebaceous glands in the eyelids abnormally produce the fatty layer of the tears, whose function is to cover the area between the eyelid in front of the eye area, and delay the evaporation of the tears (thus keeping the eye moist). The resulting dryness is an environment that encourages the growth of bacteria. Posterior eyelid inflammation can also develop as a result of other skin diseases such as rosacea and scalp dandruff.
Who is at increased risk of developing blepharitis?
Those who suffer from the following conditions: dandruff in the scalp and face area, rosacea (a skin disease that causes redness and a kind of bumps on the face), oily skin and allergies that may affect the eyelashes.
Incidence of blepharitis:
Most types of blepharitis affect adults and children of both sexes. However, certain forms such as bacterial blepharitis (as a result of staphylococcus) occur mainly in women. Apparently the prevalence of the condition reaches up to half of the population so it is very common.