ABSTRACT
BACKGROUND/AIMS: To investigate immune-related ophthalmic side effects of systemic checkpoint inhibitors and compare side effect frequency and requirement for cessation of immunotherapy by checkpoint target. METHODS: Patients taking immune checkpoint inhibitors at a single centre from January 1, 2010 to February 29, 2020 were retrospectively reviewed for clinical characteristics, treatments and concurrent systemic adverse effects. RESULTS: Of 996 patients, 28 (2.8%) experienced an ophthalmic side effect that came to the attention of an eye care provider. Mean age at presentation of the side effect was 63 years (median 64, range 25-88). The checkpoint inhibitor most often preceding side effects was pembrolizumab in 12 (43%). The most common side effect was dry eye in 16 (57%), followed by uveitis in 4 (14%) patients, and singular cases of ptosis and binocular diplopia, among others. Ocular surface adverse effects occurred more frequently with programmed death ligand-1 (PD-L1) targeting therapy. There were no significant differences in the frequency of orbit/ocular adnexa and uveitis or retinal side effects based on checkpoint targets. Follow-up was available in 13 (46%) patients, with mean duration of 20 months (median 16, range 2-52 months). Of these patients, the ophthalmic side effects were controlled without discontinuing therapy in 12 (92%). Checkpoint inhibitor cessation was required in one patient with panuveitis. CONCLUSION: Ophthalmic immune-related adverse events are rare but could be more common than previously estimated. PD-L1-directed checkpoint inhibitors may have a slight predilection for ocular surface adverse effects. Most ophthalmic events can be treated with targeted therapy without discontinuation of life-prolonging immunotherapy.