Blepharitis refers to inflammation of the eyelids or the glands of the eyelid (meibomian glands.) The most common cause of Blepharitis is due to allergies. Other causes may be congenital abnormalities, infection, tumors, or other inflammatory disorders.
This condition can occur when the oil glands near the eyelash base become inflamed and irritated. Blepharitis can be caused by several factors, therefore the treatment and prognosis can vary depending upon the underlying cause of the condition.
Conjunctivitis is a condition in which the conjunctiva (pink tissue that lines the inner surface of the eyelids) becomes reddened, swollen and painful. It is generally caused by foreign matter, bacteria, chemicals or environmental irritants (such as smoke.) Conjunctivitis may be a symptom of an eye infection, blockage or dry eye. Furthermore, it may lead to problems with the cornea, such as ulcers, scarring, vascularization, mineralization, sequestrum or adhesions.
Corneal Ulcers can occur when the outer epithelial layer of the cornea becomes damaged. The cornea is comprised of several layers of collagen, fibers and nerve fibers, which protect the cornea. When those layers become damaged, complications can occur which may be treated with corneal debridement or keratotomy surgery.
Episcleritis is an inflammation of the episclera, which is the thin outer layer of tissue that covers the sclera (fibrous covering of the eyeball.) This condition usually looks like a pink lump or nodule on the white part of the eye. Episcleritis is believed to be an auto-immune type reaction.
Eyelid masses are growths that appear on the eyelid and can be benign or malignant. Depending on the size, location and appearance, a biopsy may be necessary to determine the type of mass involved. All masses, even benign ones, can cause irritation to the cornea.