Conjunctivitis Management

Introduction

Conjunctivitis is a common condition that requires proper diagnosis and management to prevent complications and promote recovery, as recommended by the American Academy of Ophthalmology 1, 2

Proper differentiation from infectious conjunctivitis is essential, as allergic conjunctivitis requires different management 1
The primary treatment for conjunctivitis depends on its cause, with bacterial cases requiring topical antibiotics, viral cases needing supportive care, and allergic cases responding to antihistamines and mast cell stabilizers, as recommended by the American Academy of Ophthalmology 1, 2
Bacterial conjunctivitis is usually caused by Streptococcus pneumoniae or Haemophilus influenzae, and is common in children, with signs including purulent discharge and mattering of eyelids 1, 2
Viral conjunctivitis is the most common overall cause, often adenoviral, with signs including watery discharge and burning/gritty sensation, and requires supportive care, including cold compresses and preservative-free artificial tears 1, 2
Allergic conjunctivitis is associated with intense itching, bilateral involvement, and watery discharge, and often has a seasonal pattern, with first-line treatment including topical antihistamines with mast cell-stabilizing properties, such as ketotifen and olopatadine, as recommended by the American Academy of Ophthalmology 1, 2

Topical antihistamines with mast cell-stabilizing properties, such as ketotifen and olopatadine, provide dual action by blocking histamine receptors and preventing mast cell degranulation, and are recommended for treatment of allergic conjunctivitis 1
Topical mast cell stabilizers, including sodium cromoglycate and lodoxamide, are useful for maintenance therapy and prevention of allergic conjunctivitis 1
A brief course of topical corticosteroids with low side-effect profile, such as loteprednol or fluorometholone, may be considered for severe cases of allergic conjunctivitis, but requires close monitoring for intraocular pressure elevation and cataract formation 1
Topical cyclosporine 0.05% may be effective for severe allergic conjunctivitis and is particularly useful in preventing seasonal recurrences 1
Tacrolimus drops/ointment 0.03% can be considered for severe cases of allergic conjunctivitis in children 2 years and older, specifically when other therapies have failed 1
Moxifloxacin 0.5% ophthalmic solution is recommended for the treatment of bacterial conjunctivitis, with a dosing regimen of 1 drop in the affected eye 3 times daily for 7 days, although alternative fluoroquinolones can be used with similar dosing 3
Ganciclovir 0.15% gel is preferred for treatment of viral conjunctivitis, applied 3-5 times daily due to less toxicity, as recommended by the American Academy of Ophthalmology 2, 4

Regular follow-up is necessary based on the severity of symptoms, and monitoring for intraocular pressure elevation, cataract formation, and signs of infection is required if topical corticosteroids are used 1
Referral to a pediatric allergist may be considered for identification of specific allergens, comprehensive allergy testing, and potential allergen-specific immunotherapy for older children with persistent symptoms 1, 2
Immediate referral is indicated for visual loss, moderate or severe pain, corneal involvement, conjunctival scarring, lack of response to therapy within 3-4 days, or recurrent episodes, underscoring the need for timely medical intervention 1

Indiscriminate use of antibiotics: Irritant conjunctivitis is not infectious; antibiotics are unnecessary and may cause toxicity, emphasizing the importance of appropriate antibiotic use 1
Prolonged steroid use: Can lead to increased intraocular pressure, cataract formation, or worsening of undiagnosed infections, highlighting the risks associated with prolonged corticosteroid use 1
Inappropriate steroid use, especially in viral conjunctivitis, can worsen infection, as warned by the American Academy of Ophthalmology 1
Inadequate treatment duration, misdiagnosis, overlooking contact lens-related issues, missing underlying causes, and inappropriate steroid use are potential pitfalls in the management of conjunctivitis 2, 4