The eyelids become swollen and have ulcerative, non-healing areas that may even bleed. There is a yellowish sticky discharge which is more abundant in the morning and cause eyelid matting of the eyelashes. The other symptoms include itching, burning, gritty and foreign body sensation in the eyes.
Vision is usually not affected in blepharitis, although a poor tear film result into blurring of vision and sensitivity to light. The chronic inflammation of blepharitis can cause redness of the eyes.
In allergic blepharitis, the eyelids may appear dark. This condition is called “allergic shiner” and which tends to be more frequent in children as compared to adults.
Untreated cases of blepharitis can also present with various complications like stye, chalazion, trichiasis or even loss of eyelashes. Conditions like entropion and ectropion are not commonly associated with blepharitis.
Thorough careful routine examination of the eyelids and eyelashes is usually sufficient to establish the diagnosis of blepharitis . Further tests and procedures used to diagnose blepharitis include the following.
Examination of eyelids: Blepharitis can be diagnosed by routine examination of eyelids and eyelashes. A slit lamp microscope can be used for detailed examination of cornea, iris and lens under high magnification.
Skin swab for test: In certain cases, a swab can be used to collect a sample of oil or crusts that is formed on eyelids. This sample can be used to analyze bacterial, fungal or allergic cause of blepharitis.
Blepharitis can be treated through proper eyelid hygiene. If left untreated, it can lead to severe complications. Treatment of blepharitis consists of the following elements.
Despite proper treatment, the disease may recur in certain cases.
Overall, the prognosis for patients with blepharitis is good. Blepharitis usually responds to treatment, but in some cases the disease may recur and develop into chronic blepharitis. Chronic blepharitis is usually resistant to treatment and can lead to complications. In severe cases, patients may develop corneal complications which can cause loss of vision.
Blepharitis can result from many causes. The most common of them is bacterial infection causes by staphylococcal species . Seborrheic dermatitis is most commonly caused by dandruff of the scalp and eyebrows .
Allergic reactions caused by medications, contact lenses or eye makeup may also result in blepharitis . Poor nutrition and poor hygiene can be a contributory factor for the development of blepharitis. Eyelash mite or lice can also cause blepharitis   .
Blepharitis is a common eye disorder throughout the world. There are no racial differences in the incidence of blepharitis, and the disease is found equally in both men and women. It affects people of all ages; however, seborrheic dermatitis is seen more frequently in an older age group.
Blepharitis is most commonly caused by bacterial infection. The microbial invasion into tissues causes an inflammatory processes. This is the release of a number of bacterial toxins, chemical mediators and enzymes. The eyelid tissues being sensitive to the toxins secreted by these bacteria result into a thick, sticky discharge which may cause the eyelids to stick overnight.
The meibomian glands found in the lids produce secretions that maintain the outer lipid layer in the lid. This lipid layer reduces the evaporation of the aqueous component of tears. In patients with blepharitis, there is an obstruction in the meibomian gland ducts that reduces the amount of lipid secretion. This can result in increased evaporation of the aqueous component, leading to dry eyes.
The most effective way to prevent blepharitis and its recurrence is to keep the eyelids and face clean. Care must be taken to avoid exposure to smoke and chemical fumes, and exposure to sunlight should be avoided as well while taking antibiotics. The use of an anti-dandruff shampoo may help prevent blepharitis if dandruff is contributing to the blepharitis. The use of eye makeup should also be avoided to prevent further irritation.
Blepharitis is the inflammation of the eyelids that usually involves the lower part of the lids and eyelashes. It is characterized by itching, burning, swelling and redness in both eyes, excessive tear production and loss of eyelashes. It is the most common eye disease.
Blepharitis may be classified into seborrheic, ulcerative, staphylococcal and parasitic varieties. It is sometimes a chronic condition that can be difficult to treat, but it does not usually affect vision or damage the eye.