BACKGROUND: Allergic contact dermatitis (ACD) in the eye region caused by topical eye medications is difficult to diagnose and may be overlooked.

OBJECTIVE: To study the characteristics and causative agents in patients with ACD caused by topical eye medications in a Danish tertiary dermatology department.

METHODS: A retrospective study of 318 patients, patch tested between 2013 and 2021 due to suspected ACD to topical eye medications. All patients were tested with a locally developed eye medication series, some were additionally tested with suspected eye medications. Medical records were studied in patch test positive patients.

RESULTS: Contact allergy to a topical eye allergen/medication was found in 12.9% (n = 41) of 318 patients, and culprit allergens were phenylephrine (6.9%), timolol (2.5%) and ketotifen (1.6%). Patch test positive patients were often previously diagnosed with cataract (29.3%) or glaucoma (24.4%), and the majority reported more than one previous reaction. Initial symptoms were oedema (56.0%), erythema (48.8%) and dermatitis (31.7%) in the eye region, and facial dermatitis was also seen.

CONCLUSIONS: Patients with symptoms from the eye region who have been using topical eye medications should be patch tested with ingredients from commonly used eye medications supplemented by the products tested 'as is'.