Corneal Disease Treatment - Wellish Abrams Vision Institute

Cornea, External Disease, and Anterior Segment

The most anterior, clear portion of the eye is called the cornea. It is the first structure light traverses on its way into the eye. Any condition that affects the cornea can affect the cornea’s ability to help focus light on the retina, and thus affecting one’s ability to obtain a clear image. Since the cornea creates two-thirds of the focusing power of the eye, even a small change in the cornea may lead to changes in one’s vision. Conditions of the cornea may be treated with medications or cornea surgery.

Ophthalmologist doctor holding part of eye model. Eye anatomy structure, oculus and health care concept corneal disease treamtent.

Common Conditions that Affect the Cornea

Dry Eye

Many people experience a sensation of eye dryness, commonly referred to as “dry eye.” Symptoms range from an irritated eye in certain conditions to blurriness, redness, and foreign body sensation. These symptoms may only mildly interfere with one’s life or in some cases cause a severe disability. This irritation of the surface of the eye can have many different causes and is important for us to determine which ones apply to you. A variety of treatment options are available, the choice of which depends on the severity of the disease and what is seen on examination.

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Inflammation and infection of the conjunctiva and cornea:

Inflammation may affect the conjunctiva, a highly specialized membrane that covers the front of the eye. Allergies, reactions to chemicals, or infections may cause it. Viruses, fungi, bacteria, or protozoa may cause infections. If the infection affects the cornea, it may cause a corneal ulcer. Corneal infections are associated with redness, pain, light sensitivity, and reduced vision in the affected eye. Any infection in the cornea can lead to scar formation. Scarring can reduce the quality of vision, so prompt diagnosis and treatment of infections is critical. Risk factors for corneal infections include contact lens wear, injury, or eye trauma.

Fuchs’ Dystrophy

Fuchs’ dystrophy is a non-inflammatory, genetic corneal condition that may be progressive and may affect both eyes. The internal cell lining of the cornea, called the endothelium, becomes damaged. If the endothelium does not function properly, fluid accumulates in the cornea, which causes clouding and a slight decrease in vision. Initially, patients may notice blurred vision in the morning, accompanied by a glare or halos around lights. As the dystrophy progresses, one’s vision can be blurred all day long. Early Fuchs’ dystrophy can be treated with hypertonic saline drops to help remove excess fluid from the cornea. In more advanced cases, partial corneal transplantation (Endothelial Keratoplasty) may be necessary to replace the damaged cells and restore vision. Modern-day endothelial keratoplasty is highly successful, and patients experience a faster recovery compared to previous transplantation methods available.

Keratoconus

In keratoconus, the cornea progressively thins and weakens. As the structural integrity diminishes, the cornea bulges into an irregular, cone-like shape, distorting vision. Initially, glasses or soft contact lenses may be sufficient; however, as the disease progresses, vision distortion may worsen, and corrective lenses may become inadequate.

To prevent progression and preserve vision, early intervention with Corneal Cross-Linking (CXL) is strongly recommended. CXL is currently the only FDA-approved treatment shown to slow or halt the advancement of keratoconus and reduce the risk of permanent vision loss. In severe or untreated cases, a full-thickness corneal transplant may be required to restore good vision.

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FAQ: Cornea and Corneal Disease

You should schedule an exam if you notice new or worsening symptoms like redness, pain, light sensitivity, blurred or foggy vision, a “film” that does not clear, or a feeling like something is in your eye. Sudden vision changes or severe pain are urgent and should be checked right away.

Dry eye affects the surface of the eye, including the cornea, so it is both a comfort issue and a vision issue. When the tear film is unstable, the cornea does not stay smooth and hydrated, which can cause burning, blurring, and eye fatigue. Treating dry eye helps protect the cornea and often improves clarity of vision.

Corneal infections and ulcers are always taken seriously because they can lead to permanent scarring and vision loss if not treated quickly. If you have red eyes with pain, light sensitivity, discharge, or a new white spot on the cornea, you should call for an urgent appointment, especially if you wear contact lenses.

Fuchs’ dystrophy is a genetic condition that affects the inner cell layer of the cornea, causing fluid buildup and clouding over time. Many patients do well for years with drops that help dry out the cornea. If the condition becomes advanced, modern partial corneal transplant surgery can often restore clearer vision and has a shorter recovery than older full-thickness transplants.

Keratoconus often shows up as frequent prescription changes, increasing astigmatism, or blurred and distorted vision that does not fully clear with glasses. Some people notice more glare and halos, especially at night. If your glasses never feel “quite right” or your prescription is changing quickly, a cornea specialist can check for keratoconus with topography and other imaging.

Corneal Cross Linking, or CXL, is a treatment that strengthens the cornea to slow or stop the progression of keratoconus. It is designed to keep the disease from getting worse, not to fully correct vision by itself. Many patients still need glasses or specialty contact lenses afterward, but CXL reduces the risk of needing a corneal transplant later.

Corneal surgery is usually recommended when scars, swelling, or irregular shape prevent you from seeing well with glasses or contact lenses, or when a condition like Fuch’s dystrophy or advanced keratoconus has significantly damaged the cornea. Your cornea specialist will discuss whether a partial thickness procedure or a full thickness transplant is the best option for your eye and your daily vision needs.