What Is the Cornea?
The cornea is the clear, dome-shaped layer of tissue covering the front of your eye. It acts as your eye’s outermost protective layer as well as a lens, bending and focusing light so it can travel through the pupil to the retina. As a protective barrier, the cornea shields the rest of the eye from dust, germs, and other outside elements.
The cornea has no blood vessels of its own, so it relies on tears and the fluid inside the eye for nourishment, which is part of why a healthy, stable tear film is so important to corneal health. Even small changes to the cornea’s shape, clarity, or surface can noticeably affect vision, comfort, and overall eye health.
Signs Your Cornea May Need Attention
Corneal problems don’t always look the same from one person to the next, but there are common warning signs worth having evaluated by an eye doctor, including:
- Eye pain, irritation, or a gritty, foreign-body sensation
- Redness that doesn’t resolve on its own
- Blurry, fluctuating, or distorted vision
- Increased sensitivity to light
- Excessive tearing or, conversely, chronic dryness
- Halos or glare around lights, especially at night
- A cloudy, hazy, or white appearance to the cornea
If you’re experiencing any of these symptoms, don’t wait for them to worsen. Early evaluation with Dr. Brown can make a difference in how a corneal condition is treated and managed.
What Conditions Affect the Cornea?
The cornea is very complex. Because of this, there are many conditions, ranging from mild to sight-threatening, that our cornea specialist is trained to diagnose and treat.
Ocular Surface Disease
Ocular surface disease refers to a group of conditions that affect the delicate, tear-covered surface of the eye. Because the ocular surface plays such an important role in comfort and clear vision, even mild irritation or inflammation here can significantly impact how your eyes feel day to day.
Dry Eye
Dry eye develops when your eyes don’t produce enough tears, or when the tears you do produce aren’t of the right quality to keep your eyes properly lubricated. When left untreated, dry eye can lead to persistent irritation, inflammation, and even damage to the surface of the cornea.
To diagnose dry eye accurately, we use TearLab testing, which measures the salt concentration (osmolarity) of your tears. This is an in-office test that allows us to confirm a dry eye diagnosis and gauge its severity, rather than relying on symptoms alone, so we can build a treatment plan around your specific needs.
Blepharitis and Meibomian Gland Dysfunction
Blepharitis is inflammation of the eyelids, often caused by blocked oil glands along the lash line. When the meibomian glands, which supply the oily layer of your tears, become clogged or underperform, it’s known as meibomian gland dysfunction (MGD). MGD is one of the most common underlying causes of dry eye and often requires its own targeted treatment.
Allergic and Chronic Conjunctivitis
Ongoing inflammation of the conjunctiva, the thin membrane covering the white of the eye and inner eyelids, can also disrupt the ocular surface and contribute to chronic irritation, redness, and discomfort.
Corneal Disease
Beyond the ocular surface, several conditions can affect the deeper structure and clarity of the cornea itself.
Keratoconus
Keratoconus is a progressive condition in which the cornea gradually thins and bulges outward into an irregular, cone-like shape. As the shape of the cornea changes, light entering the eye is no longer focused correctly, leading to blurred, distorted vision that glasses alone often can’t fully correct. Because early intervention can help slow or stop its progression, regular corneal evaluations are especially important for patients with a family history of the condition or frequent changes in their glasses prescription.
Fuchs’ Corneal Dystrophy
Fuchs’ Corneal Dystrophy is a slowly progressive condition caused by the gradual loss of specialized cells on the innermost layer of the cornea. These cells are responsible for pumping excess fluid out of the cornea to keep it clear. As they diminish, fluid can build up and cause the cornea to swell and cloud over. As the condition progresses, vision may become increasingly hazy, and glare or halos around lights may become more noticeable.
Corneal Infections (Keratitis)
Keratitis refers to inflammation of the cornea, most often caused by a bacterial, viral, or fungal infection.
It can develop from contact lens overwear or contamination, an eye injury, or even a common cold sore virus, and typically causes pain, redness, light sensitivity, and blurred vision. Because the cornea can scar permanently if an infection isn’t treated quickly and appropriately, keratitis is considered an urgent eye condition.
Corneal Scarring and Trauma
Corneal scarring can result from a variety of causes, including physical injury, a previous infection, or complications from earlier eye surgery.
When the cornea heals from damage, the resulting scar tissue is often less clear than the surrounding healthy cornea, which can scatter or block light, leading to blurred or distorted vision. The degree of visual impact depends largely on the size, depth, and location of the scar, particularly whether it sits over the central part of the cornea used for sharp, focused vision.
Depending on severity, treatment can range from specialty contact lenses to a corneal transplant to restore clearer vision.
Cornea Treatments and Procedures
Not every corneal condition needs the same level of care.
Some, like mild dry eye or a corneal abrasion, can be managed with in-office therapies or targeted eye drops. Others, like keratoconus, may call for specialty contact lenses, corneal cross-linking, or CAIRS to stabilize the cornea.
And for corneal disease that’s progressed too far to treat any other way, a corneal transplant can restore clarity and vision. Whatever your condition, our cornea specialist will walk you through the right option for your eyes.
What is a Corneal Transplant?
When the cornea is too damaged, scarred, or diseased to restore vision through other means, a corneal transplant may be recommended.
During this procedure, damaged corneal tissue is replaced with healthy donor tissue. Depending on which layers of the cornea are affected, Dr. Brown may recommend a full-thickness transplant or a partial-thickness technique that replaces only the damaged layers, preserving as much of your own healthy cornea as possible.
Dr. Brown will determine which approach best fits your eye, giving you the best possible chance at a clear, lasting recovery.
How is Dry Eye Treated?
Dry eye is rarely a one-size-fits-all condition, which is why we start with a thorough evaluation, including TearLab testing, before recommending treatment.
Because dry eye has so many possible causes, we offer a range of treatments to target the specific source of your symptoms:
- ILux: An in-office thermal pulsation treatment that gently warms and expresses blocked meibomian glands, helping restore healthy oil flow to your tear film and relieve symptoms associated with MGD.
- BioTissue (CAM360): A biologic amniotic membrane treatment that harnesses the eye’s own natural healing properties to calm inflammation and support recovery of a healthy ocular surface, often used for more moderate to severe cases.
- Prescription Therapy: Targeted prescription eye drops that reduce inflammation and help your eyes produce healthier, more consistent tears over time.
Whether your symptoms are mild and occasional or chronic and disruptive, our goal is to find you a treatment plan that provides lasting relief.
Why Choose Metrolina for Cornea Care
Metrolina Eye Associates is dedicated to providing comprehensive eye care to patients of all ages. Our cornea specialist, Douglas Brown, MD, focuses on cornea, cataract, and refractive surgery, bringing focused expertise to even the most complex corneal conditions.
We take a personal approach with every patient who walks through our doors. Our use of cutting-edge diagnostic technology allows us to identify corneal and ocular surface conditions early, when treatment tends to be simplest and most effective. For more advanced conditions, our patients have access to the latest treatments and surgical techniques, including corneal transplant.
Whether you’re dealing with everyday dry eye symptoms or need a corneal transplant, you can trust our team to guide you with clear communication and a treatment plan built around your eyes and your life. We accept most major medical insurance and vision plans, and we always welcome new patients.
Corneal disease and ocular surface conditions can affect your comfort and your vision, but you don’t have to manage them alone. If you’re experiencing symptoms of dry eye or another corneal disease, schedule an appointment at Metrolina Eye Associates at one of our Charlotte locations today.