The cornea is the eye’s outermost layer. It is the clear, oval-shaped surface which covers the frontal part of the eye. It plays an important role in focusing the vision. The cornea acts as a protective layer against dirt, germs, and other particles which can harm the eye. The cornea shares this protective task with the eyelids and eye sockets, tears, and the sclera. The cornea also plays a key role by focusing the light that comes into the eye. The cornea also serves as a filter that screens out damaging UV light from the sun. Without this protection, the lens and the retina would be exposed to injury from UV rays.
What affects the cornea ?
Injuries : After minor injuries or scratches, the cornea usually heals on its own. Deeper injuries can cause corneal scarring, resulting in a haze on the cornea that impairs vision.
Allergies: The most common allergies that affect the eye are those related to pollen. The general symptoms of allergies in the eye include redness, itching, tearing, burning, stinging, and watery discharge. Keratitis : It is an inflammation of the cornea. Noninfectious keratitis can be caused by a minor injury or from wearing contact lenses for too long. Infection is one of the most common cause of keratitis. Infectious keratitis can be caused by bacteria, viruses, fungi or parasites. Dry eye : It is a condition in which the eye produces fewer or lower quality tears and is unable to keep its surface lubricated. Corneal Dystrophies : It is a condition in which one or more parts of the cornea lose their normal clarity due to the buildup of material that clouds the cornea. It affects the vision in different ways. Some of the most common corneal dystrophies include keratoconus, Fuchs dystrophy, lattice dystrophy and map-dot-fingerprint dystrophy.
Ocular Herpes : Herpes of the eye, or ocular herpes, is a recurrent viral infection that is caused by the same virus that causes cold sores. It can produce sores on the surface of the cornea and over time the inflammation may spread deeper into the cornea. There is no cure for ocular herpes, but it can be controlled with antiviral drugs.
What is the best treatment for corneal diseases ?
Phototherapeutic keratectomy (PTK) is a surgical technique which uses UV light and laser technology to reshape and restore the cornea. PTK is used to treat recurrent erosions and corneal dystrophies, such as map-dot-fingerprint dystrophy and basal membrane dystrophy. In case of severe injuries, corneal transplant surgery is performed to remove the damaged portion of the cornea and to replace it with healthy donor tissue. Corneas are the most commonly transplanted tissue worldwide.
Neera Eye Centre is comprehensive eye health facility located in Delhi. It provides the right solutions to all kinds of corneal diseases, with better care and satisfaction.