“…8,102-105 Ocular involvement is severe, but infrequent, with conjunctivitis, recurrent uveitis, scleritis, or optic disc and retinal vasculitis occurring almost exclusively in patients with HUV. 5,9,[106][107][108] Therefore, UV associated with systemic involvement is more likely to be hypocomplementemic, but lower than normal levels of complement may not result following a single determination, and may require multiple testings. Patients with UV and mild or no systemic symptoms but hypocomplementemia need a careful follow-up.…”