Conjunctivitis and Keratitis
Learn what the condition is, how it may be detected early, how it is treated or managed, and which breeds or species are linked to it.
Condition snapshot
A concise guide to the condition’s pattern, detection, management and urgency.
This snapshot is a general guide, not a diagnosis or treatment plan. New, severe or worsening signs require veterinary assessment.
About the condition
Inflammation of the conjunctiva or cornea may result from trauma, retained shed, infection, vitamin deficiency, poor water quality or irritating substrate. Corneal ulcers can deepen quickly.
Conjunctivitis inflames tissues around the eye, whereas keratitis damages the cornea and can threaten vision through ulceration, infection or perforation. Chelonians and lizards may develop eyelid swelling and discharge from poor water quality, foreign material, trauma, vitamin A deficiency or respiratory disease. Species with spectacles require a different anatomic approach because apparent surface cloudiness may lie beneath the transparent covering. Retained shed, substrate particles, bites and inappropriate lighting can injure the eye. Bacterial or fungal infection may be primary or secondary to a defect. A closed eye rapidly affects feeding and predator awareness, but opening it forcibly can worsen pain. Steroid-containing eye drops are hazardous when a corneal ulcer or uncontrolled infection is present. Treating every swollen eye as vitamin deficiency or every cloudy eye as infection misses important structural causes.
Dust, low humidity, dirty aquatic water, rubbing, bites and hypovitaminosis A increase risk. Closed or swollen eyes, discharge, cloudiness, rubbing, reduced feeding and visible corneal defects may occur.
Conjunctival and corneal inflammation can result from substrate, low humidity, poor water quality, trauma, infection, vitamin imbalance or retained spectacle disease. Chelonians and lizards may hold the eye closed and stop feeding, while snakes with spectacles show opacity or subspectacular material rather than exposed conjunctiva. Corneal ulceration is painful and can deepen rapidly. Bilateral disease increases suspicion for environmental, nutritional or systemic causes. Persistent eye closure deprives basking species of normal visual cues and can cause secondary dehydration or weight loss even when the primary lesion is localised. Ocular discharge can also originate from respiratory or oral disease through connected ducts, explaining recurrence after isolated eye medication.
Screening & Early Detection
Examine eyelids, conjunctiva, cornea, spectacle, mouth and nares with magnification. Fluorescein staining is useful on an exposed cornea to identify ulceration, while intraocular pressure and ocular ultrasound may be needed for deeper disease. Evert eyelids or inspect recesses for foreign bodies using safe restraint. Cytology and culture guide treatment of exudative or progressive lesions. Review water quality, substrate, UV and nutritional history, and assess the respiratory tract when nasal discharge or facial swelling accompanies eye disease.
An ophthalmic examination, fluorescein stain and cytology or culture may be needed. The spectacle of snakes requires specialised assessment.
Inspect eyelids, conjunctiva, cornea and surrounding skin with magnification and compare both eyes. Fluorescein, cytology, culture and intraocular pressure are selected according to anatomy and lesion; snake spectacles alter how surface tests are interpreted. Examine the mouth, respiratory tract and diet and test water quality when those systems may be driving recurrence. Test visual feeding responses and weigh the reptile because inability to locate food may be more clinically important than the amount of discharge.
Treatment & Management
Correct the cause and use targeted eye medication. Steroid drops are unsafe in an ulcerated or infected eye unless specifically prescribed. Flush loose debris with sterile saline and remove embedded foreign material under magnification and analgesia. Choose topical antibiotic or antifungal therapy from lesion depth and testing, using formulations without unsafe preservatives when frequent application is needed. Do not use corticosteroid drops over an ulcer or active infection unless an ophthalmically trained veterinarian has established a specific indication. Lubrication and systemic pain relief support healing; deep ulcers may need surgical grafting or other specialist procedures. Correct water quality, substrate, vitamin A balance and respiratory disease. Prevent rubbing while preserving normal thermoregulation, and repeat stain or examination until the corneal surface is demonstrably healed rather than stopping when the eye first opens.
Flush particulate matter with sterile solution and use reptile-safe lubrication, analgesia and targeted topical therapy. Corticosteroid drops are avoided when ulceration or infection is present. Foreign material, retained keratin and abscesses may require procedural removal, while deep or perforating ulcers need urgent specialist surgery. Maintain feeding and hydration and confirm healing by repeat examination rather than apparent eye opening alone.
Superficial disease often heals; deep ulceration may cause permanent vision loss.
Breeds or species affected
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