Neurotrophic keratitis treatment is treated for a cornea which has lost normal nerve function. When corneal nerves do not work as they should the eye may see a reduction in blink reflex, tear production and wound healing. The eye can present with an epithelial defect or ulcer which may not be painful at all. Early evaluation is very important because if left untreated the disease may produce infection, scarring, thinning of the cornea or even perforation.
What Is Neurotrophic Keratitis?
Neurotrophic keratitis is a corneal degenerative disease which results from corneal nerve damage. In a healthy state the cornea is supported by trigeminal sensory nerves which also play a role in the repair process. Upon failure of these nerves what results is a neurotrophic cornea which may not heal properly.
Possible causes are herpes simplex or herpes zoster eye disease, diabetes, past eye surgery, chemical injury, long term use of topical medicines and neurological disease. In the case of a previous corneal abrasion healing may be slow. This may turn a simple surface issue into a chronic problem. Also it is seen that in which there is reduced sensation corneal nerve damage may present itself. Thus what was a minor issue may in fact become a very persistent problem.
What Are Neurotrophic Keratitis Symptoms?
Neurotrophic keratitis symptoms may present mildly as diminished sensation does not cause pain. Blurred vision, redness, dryness, light sensitivity and a foreign body sensation is also a common report. In some cases a non healing corneal ulcer may present which in contrast to the name of the disease is relatively painless.
| Finding | What It May Mean | Urgency |
| Mild blur or dryness | Early surface instability | Review if persistent |
| Persistent epithelial defect | Poor corneal healing | Prompt ophthalmic review |
| White spot, discharge or increasing redness | Ulcer or possible infection | Urgent assessment |
| Sudden vision reduction or marked thinning | Advanced complication | Urgent ophthalmic care |
Neurotrophic keratitis symptoms present during corneal exam, not solely in terms of pain. Repeated epithelial breakdown is a sign of ongoing corneal nerve damage.
How Is Neurotrophic Keratitis Diagnosed?
Diagnosis in this case includes review of medical history and slit-lamp exam. An ophthalmologist will look at diabetes, past eye infections, surgery, medications and neurological conditions. Corneal sensation test is a key element of diagnosis. The physician will compare sensation between different areas of the cornea which at times may use an esthesiometer. An atypical result of the corneal sensation test supports diagnosis when other exam results point to a neurotrophic cornea. Also supported by expert consensus is the precept of corneal sensitivity assessment in the case of neurotrophic keratopathy.
Fluorescein will stain epithelial defects. For some patients it uses corneal imaging or confocal microscopy. Also use corneal sensation test to tell apart neurotrophic disease from infection, severe dry eye or exposure related damage.
Neurotrophic Keratitis Treatment by Stage
Neurotrophic keratitis treatment varies by stage of disease, cause and state of the ocular surface. In early neurotrophic keratitis vasan eye care aims to prevent epithelial breakdown. At more advanced stages that focus on wound healing and preservation of the cornea.
| Stage | Typical Feature | Common Management Approach |
| Early | Surface irregularity without an ulcer | Preservative-free lubrication and treatment of contributing disease |
| Moderate | Persistent epithelial defect | Protective lenses, biologic tear options, membrane therapy and close review |
| Advanced | Ulcer, thinning or perforation risk | Intensive corneal protection and selected surgical treatment |
Neurotrophic keratitis treatment options are preservative free lubricants, autologous serum based preparations, therapeutic contact lenses, punctal occlusion and amniotic membrane therapy. They use these to support a neurotrophic cornea as address the base cause of the corneal nerve damage.
Selected patients have been given cenegermin which is a recombinant human nerve growth factor. In 2018 the US FDA approved cenegermin for neurotrophic keratitis. In the FDA’s clinical review it was reported that in one trial 72% had complete epithelial defect resolution as compared to 33% in the control group and in another 65% had resolution as compared to 17% in the control group. It is to be noted that these results are from clinical trials and do not predict individual outcomes.
When chronic cases of neurotrophic keratitis treatment don’t respond to healing measures that may see use of tarsorrhaphy, amniotic membrane procedures, corneal transplantation or corneal neurotisation in selected patients. Corneal neurotisation in this context is a procedure which aims at restoring sensory input to the affected cornea.
Why Can Corneal Numbness Become Dangerous?
Corneal nerve damage impairs an important alert system. A person may have a non healing corneal ulcer with little to no pain. A non healing corneal ulcer also may progress to infection, stromal melting, scarring or perforation. For which present increased redness, discharge, a white spot in the cornea which is easy to see, worsening ulceration or sudden vision loss that is when emergency ophthalmic assessment is required. In neurotrophic keratitis early intervention may reduce the risk of permanent corneal damage.
Related conditions can require different care. Vasan Eye Care provides information on corneal ulcer keratitis and Behcet syndrome and eye inflammation. Keratoconus treatment Vasan Eye Care keratoconus treatment addresses corneal shape rather than reduced nerve sensation.
Patients comparing pinguecula vs pterygium can review Vasan’s pterygium information and pinguecula guide. These conditions affect the eye in different ways from that of a neurotrophic cornea.
Eye Care at Vasan Eye Care
Vasan Eye Care provides for corneal and ocular surface disorders which is a specialized service that has dedicated corneal services and ocular surface disease care. Vasan eye care does evaluation which may include a slit lamp exam, a corneal sensation test and also they may do additional imaging when it is clinically indicated.
Neurotrophic keratitis treatment is treated based on the cause which is present, the issue of epithelial healing, the severity of the disease and the risk of more damage. Ignoring persistent or worsening corneal changes is not advised. An ophthalmologist will determine if a routine review or urgent care is needed.
Frequently Asked Questions
1. Can neurotrophic keratitis cause permanent vision loss?
Yes. Persistent epithelial breakdown which in turn may cause ulcers, infection, scarring, stromal thinning or perforation. In early neurotrophic keratitis vasan eye care aims to stabilize the cornea before those complications which cause permanent visual impairment.
2. What are the common neurotrophic keratitis symptoms?
Neurotrophic keratitis symptoms present with signs like blurred vision, redness, dryness and light sensitivity. Also it may go undetected at mild levels as reduced corneal sensation which diminishes pain reports even when there is extensive surface damage.
3. How is a corneal sensation test performed?
A corneal sensation test which measures how well various areas of the cornea react to light touch is performed. An ophthalmologist may use a fine filament or an esthesiometer. When other clinical signs agree the reduced sensitivity supports the diagnosis.
4. Can a non healing corneal ulcer be caused by neurotrophic keratitis?
Yes. A non healing corneal ulcer which may present in a neurotrophic cornea that has failed to repair its epithelium properly. Also at this point other causes including infection must be ruled out as treatment will depend on the base cause.
References
- Neurotrophic Keratopathy: Update in Diagnosis and Management — Indian Journal of Ophthalmology / PubMed
https://pubmed.ncbi.nlm.nih.gov/40146136/ - FDA Orphan Drug Designation and Approval — Cenegermin-bkbj (Oxervate)
https://www.accessdata.fda.gov/scripts/opdlisting/oopd/detailedIndex.cfm?cfgridkey=436214