What is Fungal Keratitis?
Fungal keratitis is a serious corneal infection caused by fungal organisms that can threaten your vision if not treated promptly. At Vasan Eye Care, our cornea specialists provide comprehensive care for fungal keratitis using advanced diagnostic tools and proven treatment protocols. With over 150 centres across India and a team of 500+ eye care experts, we are committed to helping you recover from this sight-threatening condition.
Understanding Fungal Keratitis
Fungal keratitis is an infection of the cornea (the clear, dome-shaped front surface of the eye) caused by fungal organisms. The cornea plays a vital role in focusing light into the eye, and when it becomes infected by fungi, the resulting inflammation and tissue damage can lead to significant vision loss. Fungal keratitis is also known by its medical name, keratomycosis.
Think of the cornea as the clear glass on the face of a wristwatch. In fungal keratitis, a tiny speck of fungus has entered the glass — usually through a scratch — and is slowly growing into a cloudy patch with fine feathery edges. Smaller satellite colonies may spring up around it. Because fungi grow slowly and have deep roots in the corneal tissue, fungal keratitis tends to progress more gradually than bacterial keratitis, but can be much harder to treat.
Fungal keratitis is particularly common in tropical and subtropical regions, including large parts of India, where warm and humid weather conditions encourage the growth of fungi. Agricultural workers, labourers, and individuals who spend significant time outdoors are especially at risk of developing fungal keratitis. In rural India, injuries from paddy stalks, sugarcane, thorns, and other plant matter are among the leading triggers.
Early diagnosis and prompt treatment of fungal keratitis are essential to preserve vision and prevent complications such as corneal perforation or endophthalmitis (infection spreading inside the eye). Any eye injury involving plant material, or any persistent red, painful eye after working in fields or gardens, should be evaluated by an eye specialist without delay.
Detail | Information |
Condition | Fungal Keratitis (Keratomycosis) |
Affected Structure | Cornea |
Common Causes | Trauma with vegetative matter, contact lens misuse |
Common Fungi | Fusarium, Aspergillus, Candida |
Primary Symptom | Eye pain with white or greyish corneal infiltrate |
Treatment | Antifungal eye drops, oral antifungals, surgery in severe cases |
Recovery Time | Several weeks to months |
Risk Level | High (can cause permanent vision loss if untreated) |
What are the Symptoms of Fungal Keratitis?
Recognising fungal keratitis symptoms early is critical for timely treatment and a favourable outcome. Fungal keratitis symptoms may develop gradually over days or even weeks following the initial injury or exposure. This slow onset often distinguishes a fungal eye infection from a bacterial one.
Fungal Keratitis Symptoms to Watch For
Symptom | Description | When It Appears |
Eye pain | Moderate to severe pain in the affected eye, often worsening over time | Early to mid stage |
Redness | Noticeable redness around the cornea and the white of the eye | Early stage |
Blurred vision | Progressive reduction in visual clarity in the affected eye | Early to mid stage |
Tearing | Excessive watering or tearing of the eye | Early stage |
Light sensitivity | Discomfort or pain when exposed to bright light (photophobia) | Early to mid stage |
Foreign body sensation | A feeling that something is stuck in the eye | Early stage |
White or grey corneal opacity | A visible white, grey, or yellowish patch on the cornea surface | Mid stage |
Satellite lesions | Smaller spots or infiltrates surrounding the main infected area | Mid to late stage |
Feathery corneal margins | Irregular, feathery edges around the corneal ulcer | Mid stage |
Hypopyon | A visible collection of pus in the front chamber of the eye | Late stage |
Eyelid swelling | Swelling of the upper or lower eyelid | Variable |
Discharge | Mucoid or mucopurulent discharge from the eye | Variable |
If you notice any combination of these fungal keratitis symptoms, particularly after an eye injury involving plant material, soil, or organic matter, seek immediate medical attention. Delaying fungal keratitis treatment can lead to irreversible corneal damage.
When Should You See a Doctor?
Please visit an eye specialist urgently if:
• You have had an eye injury involving twigs, leaves, paddy stalks, sugarcane, thorns, or other plant matter
• You are experiencing persistent eye pain, redness, or watering that is not improving over a few days
• You notice a white, grey, or yellowish patch on the clear front of your eye
• Your vision has become blurred in one eye
• You are finding bright light painful or uncomfortable
• You wear contact lenses and have developed pain, redness, or discharge
• You have diabetes, are on long-term steroid eye drops, or have a known weakened immune system and are now experiencing eye symptoms
• You have been using an unverified herbal or traditional eye remedy and have noticed your eye getting worse
Fungal keratitis is a medical urgency. The sooner fungal keratitis treatment begins, the better the chance of preserving long-term vision.
What are the Types of Fungal Keratitis?
Understanding the different types of fungal keratitis helps in determining the appropriate treatment approach. Fungal keratitis can be broadly classified based on the type of fungus responsible for the infection.
The Main Types of Fungal Keratitis
- Filamentous Fungal Keratitis Filamentous fungal keratitis is the most common type encountered in India and other tropical regions. It is caused by mould-like fungi that have thread-like structures called hyphae. The most frequently identified filamentous fungi causing fungal keratitis include Fusarium species (one of the most common causes worldwide, particularly in warmer climates and often associated with trauma from plant matter), Aspergillus species (another frequently encountered cause following agricultural injuries), and Curvularia species (a dematiaceous or pigmented fungus). Filamentous fungal keratitis typically presents with feathery or irregular margins around the corneal infiltrate, satellite lesions, and an immune ring. This type is strongly associated with corneal injuries from vegetative material such as twigs, leaves, paddy stalks, or thorns.
- Yeast Fungal Keratitis Yeast fungal keratitis is caused by unicellular fungi, most commonly Candida species. This type of fungal keratitis is more common in temperate regions and in patients with pre-existing eye conditions or compromised immune systems. Candida albicans is the most common yeast causing fungal keratitis, often seen in patients with dry eye disease, chronic steroid use, or those who have undergone previous eye surgery. Candida parapsilosis is another Candida species occasionally responsible. Yeast fungal keratitis usually presents with a well-defined, round corneal ulcer that may resemble a bacterial infection, making clinical differentiation challenging without laboratory confirmation.
- Dimorphic Fungal Keratitis Dimorphic fungal keratitis is a rare form caused by fungi that can exist in both filamentous and yeast forms depending on environmental conditions. Examples include Histoplasma and Blastomyces species. This type of fungal keratitis is uncommon in India but may be encountered in certain geographic regions.
What Causes Fungal Keratitis?
Understanding the causes of fungal keratitis is important for both prevention and early intervention. Several risk factors and mechanisms contribute to the development of this fungal eye infection.
Primary Causes of Fungal Keratitis
Ocular Trauma with Vegetative Matter: The single most common cause of fungal keratitis in India is injury to the eye from plant material. Twigs, thorns, leaves, paddy husks, sugarcane stalks, and other organic matter can introduce fungal organisms directly into the cornea. Agricultural workers, farmers, and gardeners are at particularly high risk of developing fungal keratitis through this route.
Contact Lens Wear: Improper use, cleaning, or storage of contact lenses significantly increases the risk of fungal keratitis. Sleeping in contact lenses, using contaminated lens solutions, or wearing lenses while swimming can create conditions favourable for fungal growth. Contact lens related fungal keratitis is more commonly caused by Fusarium species.
Pre-Existing Eye Conditions: Individuals with chronic eye surface diseases such as dry eye syndrome, herpes simplex keratitis, or previous corneal surgery may have a compromised corneal surface that allows fungal organisms to establish an infection. Pre-existing conditions that weaken the corneal epithelium are recognised causes of fungal keratitis.
Prolonged Use of Corticosteroid Eye Drops: The use of steroid-containing eye drops over a long period can suppress the local immune response of the cornea, making it vulnerable to fungal infections. Steroid use is a well-documented risk factor, particularly for yeast keratitis caused by Candida species.
Immunosuppression: Patients with weakened immune systems due to conditions such as diabetes mellitus, HIV/AIDS, or those on immunosuppressive medications are more susceptible to developing a fungal eye infection. Systemic immunosuppression reduces the body’s ability to fight off fungal organisms that reach the corneal surface.
Tropical Climate: The warm, humid climate found in many parts of India provides ideal conditions for fungi to thrive in the environment. This environmental factor contributes to the higher prevalence of fungal keratitis in tropical regions compared to cooler, drier climates.
Contaminated Eye Medications or Traditional Remedies: Use of non-sterile eye drops or traditional herbal eye remedies can introduce fungal organisms into the eye. Self-medication with unverified preparations is an avoidable cause of fungal keratitis.
How Do Doctors Diagnose Fungal Keratitis?
Accurate and timely diagnosis of fungal keratitis is essential for initiating appropriate treatment. At Vasan Eye Care, our cornea specialists employ a systematic approach to diagnose fungal keratitis.
Diagnostic Methods for Fungal Keratitis
- Clinical Examination with Slit Lamp The first step in diagnosing fungal keratitis is a detailed clinical examination using a slit lamp biomicroscope. The ophthalmologist looks for characteristic signs including feathery or irregular margins of the corneal infiltrate, satellite lesions (smaller areas of infection around the main ulcer), an immune ring (ring-shaped infiltrate around the ulcer), elevated or dry-appearing surface of the ulcer, endothelial plaque (deposits on the inner surface of the cornea), and hypopyon (pus collection in the anterior chamber). These clinical features, when present together, strongly suggest fungal keratitis.
- Corneal Scraping and Microscopy A corneal scraping is performed to collect material from the ulcer for laboratory analysis. The sample is examined using special stains including KOH (Potassium Hydroxide) Wet Mount — a rapid and widely available test that helps visualise fungal elements such as hyphae and spores, often the first laboratory test performed; Gram Stain, which helps identify bacteria and can also reveal fungal elements; Calcofluor White Stain, a fluorescent stain that binds to fungal cell walls, providing enhanced visualisation under a fluorescence microscope; and Giemsa Stain, which can identify fungal elements and assess the inflammatory response.
- Culture and Sensitivity The corneal scraping material is inoculated onto specific culture media to grow the fungal organism. Common media used include Sabouraud Dextrose Agar (SDA), Blood Agar, and Potato Dextrose Agar. Fungal cultures may take several days to weeks to show growth, which is why the initial diagnosis often relies on clinical features and microscopy while waiting for culture results. Culture results are valuable for confirming the specific fungal species and guiding targeted antifungal therapy.
- Confocal Microscopy In vivo confocal microscopy is an advanced, non-invasive imaging technique that can visualise fungal hyphae and yeast cells directly within the living corneal tissue. This tool is particularly useful for early diagnosis of fungal keratitis when clinical signs are subtle, monitoring treatment response over time, and differentiating between filamentous and yeast fungal keratitis.
- Polymerase Chain Reaction (PCR) PCR-based testing can detect fungal DNA in corneal samples with high sensitivity and specificity. This molecular diagnostic method is especially valuable when traditional microscopy and culture results are negative, a rapid diagnosis is needed, or the patient has already started antifungal treatment which may reduce the yield of cultures.
- Anterior Segment Optical Coherence Tomography (AS-OCT) AS-OCT provides cross-sectional images of the cornea, allowing the specialist to assess the depth and extent of the fungal keratitis infiltrate. This information is valuable for treatment planning and monitoring disease progression.
What Does Fungal Keratitis Treatment Look Like?
Fungal keratitis treatment requires a systematic, often prolonged approach. At Vasan Eye Care, our cornea specialists develop individualised treatment plans based on the severity of the infection, the type of fungus involved, and the patient’s overall eye health. Fungal keratitis treatment typically involves a combination of medical and, in some cases, surgical interventions. In many cases, fungal keratitis treatment is a step-by-step process rather than a single intervention.
Fungal Keratitis Treatment Options
- Topical Antifungal Therapy Topical antifungal eye drops form the cornerstone of fungal keratitis treatment. Natamycin 5% eye drops are often the first-line treatment for filamentous fungal keratitis — a polyene antifungal that binds to ergosterol in the fungal cell membrane, particularly effective against Fusarium and Aspergillus species. During the initial phase, natamycin drops may be instilled every one to two hours around the clock, with frequency gradually reduced as the infection improves. Voriconazole 1% eye drops are a broad-spectrum triazole antifungal with good corneal penetration, used particularly when the infection involves deeper corneal layers. Amphotericin B 0.15% eye drops are particularly effective against yeast organisms such as Candida species.
- Oral Antifungal Therapy For moderate to severe fungal keratitis, oral antifungal medications are often prescribed alongside topical therapy. Common oral antifungals include oral voriconazole (providing good ocular penetration and effective against a wide range of fungi), oral fluconazole (particularly useful in Candida fungal keratitis and cases with deeper corneal involvement), and oral itraconazole (an alternative effective against filamentous fungi). Oral antifungal therapy is typically continued for several weeks, with regular monitoring for potential side effects including liver function changes.
- Intrastromal or Intracameral Antifungal Injection In cases of severe or deep-seated fungal keratitis that do not respond adequately to topical and oral treatment, direct injection of antifungal agents into the corneal stroma (intrastromal injection) or the anterior chamber of the eye (intracameral injection) may be considered. Intrastromal voriconazole injection delivers a high concentration of the drug directly to the site of infection within the cornea, useful for deep fungal keratitis or cases showing poor response. Intracameral amphotericin B injection may be used when fungal keratitis is complicated by anterior chamber involvement or endothelial plaque.
- Therapeutic Corneal Procedures Corneal debridement involves regular gentle scraping of the infected corneal epithelium to improve the penetration of topical antifungal drops into the deeper corneal layers. This simple procedure enhances the effectiveness of medical treatment and is often performed during follow-up visits. Corneal Collagen Cross-Linking (CXL), also known as PACK-CXL (Photoactivated Chromophore for Keratitis), involves the application of riboflavin (vitamin B2) to the cornea followed by exposure to ultraviolet A light. This procedure has antimicrobial properties and can be used as an adjunct treatment for fungal keratitis, particularly in early to moderate cases.
- Fungal Keratitis Surgery When medical treatment fails to control the infection or when complications arise, fungal keratitis surgery becomes necessary. Therapeutic Penetrating Keratoplasty (TPK) is the most common surgical procedure for severe fungal keratitis, involving removal of the infected corneal tissue in its full thickness and replacement with a healthy donor cornea — indicated when the infection does not respond to maximum medical therapy, there is impending or actual corneal perforation, the infection is spreading rapidly despite treatment, or there is significant structural damage. Lamellar keratoplasty may be considered where the infection is limited to the superficial or mid-stromal layers, preserving the patient’s own endothelial layer. Conjunctival flap involves covering the infected corneal area with a flap of the patient’s own conjunctival tissue, bringing blood supply to the area.
- Supportive Treatment Alongside specific antifungal therapy, several supportive measures are important. Cycloplegic eye drops such as atropine or homatropine are used to dilate the pupil and relieve pain caused by ciliary spasm. Discontinuation of contact lenses is essential if contact lens wear is a contributing factor, with lenses not resumed until the fungal keratitis has fully resolved. Avoidance of corticosteroid eye drops is critical during active fungal keratitis, as they can worsen the infection. Regular follow-up with the treating ophthalmologist is essential to assess treatment response, adjust medications, and detect any complications early. Good general health and nutrition supports the immune system in fighting the fungal eye infection.
Fungal Keratitis and Agriculture in India
India has one of the highest reported incidences of fungal keratitis in the world, and this is closely linked to the country’s large agricultural workforce. Farming activities such as harvesting paddy, cutting sugarcane, clearing bushes, and working with hay expose workers to organic material that commonly carries fungal spores. Even a minor scratch to the cornea from a twig, leaf, or grain husk can allow fungal organisms to enter the corneal tissue and establish an infection.
Awareness campaigns in rural areas about the importance of wearing protective eyewear during agricultural work can significantly reduce the incidence of fungal keratitis. At Vasan Eye Care, we encourage farming communities to seek immediate medical attention after any eye injury, no matter how minor it may seem. A small scratch treated early is a very different situation from the same scratch left to develop into established fungal keratitis.
The Role of Contact Lenses in Fungal Keratitis
While agricultural trauma is the leading cause of fungal keratitis in India, contact lens related fungal keratitis is an increasing concern, particularly among urban populations. Fusarium keratitis outbreaks reported globally have highlighted the risks associated with certain contact lens solutions and poor lens hygiene practices.
To reduce the risk of contact lens associated fungal keratitis:
• Always wash and dry your hands before handling lenses
• Replace lens cases regularly, typically every three months
• Never use tap water to clean or store lenses
• Avoid sleeping in contact lenses unless specifically approved by an eye care professional
• Discard expired lens solutions
• Do not swim, shower, or use a hot tub while wearing contact lenses
• Follow the replacement schedule prescribed by your eye care professional
If you experience any symptoms of eye discomfort or redness while wearing contact lenses, remove the lenses immediately and consult an eye specialist.
Advances in Fungal Keratitis Diagnosis and Treatment
Recent years have seen significant advances in the diagnosis and treatment of fungal keratitis. In vivo confocal microscopy now allows clinicians to visualise fungal elements directly in the cornea without the need for an invasive biopsy, enabling earlier and more accurate diagnosis. PCR-based molecular diagnostics have improved the speed and sensitivity of fungal identification.
On the treatment front, newer antifungal agents and drug delivery methods, including intrastromal injections and antifungal-loaded nanoparticles, are being studied for their potential to improve outcomes. Corneal collagen cross-linking as an adjunctive therapy has also shown promise in managing infectious keratitis, including fungal keratitis. At Vasan Eye Care, we stay updated with these advances to offer our patients access to modern diagnostic and treatment options.
Living with Fungal Keratitis: Patient Guidance
Being diagnosed with fungal keratitis can be concerning, but with proper treatment and adherence to your doctor’s advice, most patients achieve a good outcome. Some practical guidance during treatment:
• Use all prescribed antifungal eye drops exactly as directed, even if the drops need to be instilled very frequently — consistency is critical
• Attend all scheduled follow-up appointments so your doctor can monitor the response of the fungal keratitis to treatment
• Avoid rubbing your eyes, and maintain good hand hygiene to prevent secondary infections
• Do not use any steroid eye drops during active fungal keratitis unless specifically prescribed by your cornea specialist
• Avoid swimming, dusty environments, and any further eye injury during treatment
• Eat well and manage systemic conditions such as diabetes carefully to support healing
• If you experience worsening pain, increasing redness, or further vision loss during treatment, contact your treating doctor or visit your nearest Vasan Eye Care centre immediately
Fungal Keratitis Care at Vasan Eye Care
Fungal keratitis is one of the more challenging corneal conditions our team at Vasan Eye Care diagnoses and treats. Because outcomes depend heavily on early recognition and sustained, correctly targeted antifungal therapy, we take a comprehensive and systematic approach for every patient.
When you visit us for a suspected fungal keratitis, here is what you can expect:
• A detailed history including any recent eye injury, agricultural exposure, contact lens use, and use of eye drops or traditional remedies
• A careful slit lamp examination to look specifically for feathery margins, satellite lesions, immune rings, endothelial plaque, and hypopyon
• Corneal scraping with KOH wet mount, Gram stain, Calcofluor white, and Giemsa staining as appropriate
• Fungal culture and sensitivity testing on Sabouraud’s and other standard media
• Confocal microscopy where available for direct visualisation of fungal elements
• PCR testing in selected complex or treatment-resistant cases
• AS-OCT to assess depth and extent of corneal involvement
• A tailored fungal keratitis treatment plan with topical, oral, and where needed intrastromal or intracameral antifungal therapy
• Regular corneal debridement and, where indicated, PACK-CXL as adjunctive therapy
• Access to therapeutic penetrating or lamellar keratoplasty for severe or non-responsive cases
• Long-term follow-up to monitor for recurrence, residual scarring, and visual rehabilitation
Our 500+ eye care experts, 5,000+ dedicated care staff, and 150+ centres across India as part of ASG Enterprises make specialist corneal care accessible wherever you are.
Fungal Keratitis at a Glance
| Aspect | Key Points |
| What it is | A fungal infection of the cornea that can threaten vision |
| Other name | Keratomycosis |
| Most common fungi | Fusarium, Aspergillus (filamentous); Candida (yeast) |
| Leading cause in India | Trauma with vegetative matter (agricultural injuries) |
| Key symptoms | Eye pain, redness, blurred vision, white corneal opacity, satellite lesions |
| Diagnosis | Slit lamp examination, corneal scraping with KOH mount, culture, confocal microscopy |
| First-line treatment | Natamycin 5% eye drops (filamentous); Amphotericin B (yeast) |
| Treatment duration | 4 to 12 weeks or longer |
| When surgery is needed | Non-responsive infection, corneal perforation, rapid progression |
| Prevention | Protective eyewear, proper contact lens hygiene, avoiding self-medication |
| Prognosis | Good with early diagnosis and treatment; delayed treatment may lead to permanent vision loss |
Glossary of Terms Related to Fungal Keratitis
| Term | Definition |
| Cornea | The clear, dome-shaped front surface of the eye that helps focus light |
| Keratitis | Inflammation or infection of the cornea |
| Keratomycosis | The medical term for fungal infection of the cornea; another name for fungal keratitis |
| Hyphae | Thread-like filamentous structures that form the body of mould-type fungi |
| Satellite Lesions | Smaller spots of infection surrounding the main corneal ulcer, characteristic of fungal keratitis |
| Hypopyon | A collection of white blood cells (pus) in the anterior chamber of the eye, visible as a white layer |
| Natamycin | A polyene antifungal medication commonly used as the first-line topical treatment for filamentous fungal keratitis |
| Voriconazole | A broad-spectrum triazole antifungal drug used in treating fungal keratitis, available as eye drops and oral tablets |
| Amphotericin B | A polyene antifungal agent particularly effective against yeast organisms; used in fungal keratitis treatment |
| Penetrating Keratoplasty | A full-thickness corneal transplant procedure used in severe cases of fungal keratitis |
| Confocal Microscopy | An advanced imaging technique that can visualise fungal elements within the living cornea |
| Corneal Scraping | A diagnostic procedure in which material is gently collected from the corneal ulcer surface for laboratory analysis |
| Endothelial Plaque | Deposits on the inner surface of the cornea, sometimes seen in fungal keratitis |
| Corneal Collagen Cross-Linking (CXL) | A procedure using riboflavin and UV light to strengthen the cornea; also has antimicrobial properties |
Related Eye Conditions
Patients researching fungal keratitis may also wish to learn about the following related eye conditions:
Bacterial Keratitis: An infection of the cornea caused by bacteria rather than fungi. It tends to progress more rapidly than fungal keratitis and requires antibiotic treatment.
Acanthamoeba Keratitis: A rare but serious corneal infection caused by the Acanthamoeba parasite, often associated with contact lens wear and exposure to contaminated water.
Herpes Simplex Keratitis: A viral infection of the cornea caused by the herpes simplex virus. It can cause recurring episodes of corneal inflammation and scarring.
Corneal Ulcer: A general term for an open sore on the cornea, which may be caused by infection (including fungal keratitis), injury, or other conditions.
Endophthalmitis: A severe infection of the internal structures of the eye, which can occur as a complication of untreated or severe fungal keratitis.
Corneal Opacity: Scarring or clouding of the cornea, which may result from healed fungal keratitis and can affect vision permanently.
References
EyeWiki (American Academy of Ophthalmology). Fungal Keratitis. https://eyewiki.org/Fungal_Keratitis
PubMed Central (PMC). Recent Advances in Fungal Keratitis. https://pmc.ncbi.nlm.nih.gov/articles/PMC10788054/
American Academy of Ophthalmology. Fungal Keratitis. https://www.aao.org/topic-detail/fungal-keratitis-europe
Disclaimer: This content is for informational purposes only and does not replace professional medical advice. Please consult a qualified ophthalmologist for diagnosis and treatment of fungal keratitis or any eye condition.
For appointments, call 1800 571 2222 or visit your nearest Vasan Eye Care centre.
Frequently Asked Questions (FAQs)
Fungal keratitis treatment involves a combination of medical and, in some cases, surgical approaches. The primary treatment is topical antifungal eye drops, most commonly natamycin 5% for filamentous fungal infections and amphotericin B for yeast infections. These drops are typically used every one to two hours initially and then gradually tapered. For moderate to severe fungal keratitis, oral antifungal medications such as voriconazole or fluconazole are added. In severe cases that do not respond to medical treatment, surgical intervention such as therapeutic keratoplasty (corneal transplant) may be required. Fungal keratitis treatment is often prolonged, lasting several weeks to months, and requires regular monitoring by a cornea specialist.
The drug of choice for fungal keratitis depends on the type of fungus causing the infection. For filamentous fungal keratitis (caused by Fusarium, Aspergillus, and similar organisms), natamycin 5% ophthalmic suspension is widely considered the first-line drug of choice. Natamycin has demonstrated good efficacy against common filamentous fungi and is readily available in India. For yeast fungal keratitis (caused by Candida species), amphotericin B 0.15% eye drops are often preferred. Voriconazole, available as both topical eye drops and oral tablets, is increasingly used as a broad-spectrum alternative for fungal keratitis caused by various fungal organisms.
The duration of fungal keratitis varies significantly depending on the severity of the infection, the type of fungus involved, the timing of diagnosis, and the patient’s response to treatment. Mild to moderate fungal keratitis typically takes four to six weeks to resolve with appropriate antifungal treatment. More severe cases may take two to three months or even longer to fully heal. In cases requiring surgical intervention, the overall recovery period can extend to several months, including the post-operative healing phase. It is important to continue treatment for the full prescribed duration even if symptoms improve, as stopping treatment prematurely can lead to recurrence.
The early stage of fungal keratitis may present with subtle symptoms that are sometimes mistaken for a simple eye irritation or a minor corneal abrasion. Early signs and symptoms include mild eye redness, a sensation of something in the eye (foreign body sensation), mild pain or discomfort, slight blurring of vision, and increased tearing. On examination, the cornea may show a small, greyish-white infiltrate with slightly irregular or feathery edges. At this early stage, satellite lesions and hypopyon may not yet be present. Recognising the early stage is crucial because treatment initiated early offers a much greater chance of preserving vision compared to treatment started at a more advanced stage.
Yes, fungal keratitis can cause permanent vision loss if not diagnosed and treated promptly. The fungal infection can lead to corneal scarring, thinning, and in severe cases, perforation. Even with successful treatment, residual corneal scarring may affect vision permanently. This is why early detection and fungal keratitis treatment at a specialised eye care centre is strongly recommended. In cases where significant scarring occurs, a subsequent optical corneal transplant may be needed to restore vision after the fungal keratitis infection has been fully treated.
Fungal keratitis is not contagious in the conventional sense. It does not spread from person to person through casual contact. The fungi that cause fungal keratitis are typically acquired from the environment, most commonly through traumatic injury to the cornea or through contaminated contact lenses or lens solutions. However, it is important to maintain good hygiene practices and not share eye medications, contact lenses, or eye cosmetics, as this could theoretically transfer fungal organisms.
Individuals at greater risk include agricultural workers and farmers (especially those working with paddy, sugarcane, or other crops), contact lens users (particularly those who do not follow proper lens hygiene), people living in tropical or subtropical climates, individuals with chronic eye surface diseases, patients using long-term corticosteroid eye drops, and those with a weakened immune system due to conditions such as diabetes or immunosuppressive therapy. In India, trauma with vegetative matter remains the single largest risk factor for fungal keratitis.
