Idiopathic multisystem disease which forms in the lymph nodes, lungs, skin and other areas including eyelid skin, lacrimal gland and sac and nasolacrimal duct. Symptoms include fatigue, weight loss, fever, coughing, uveitis, cranial nerve palsies and skin lesions. Some patients also develop dry eyes. May cause redness, pain, swelling of involved lids or lacrimal glands, painless subcutaneous nodular masses in eyelids, ptosis, diplopia, sever cicatrizing conjunctival inflammation, conjunctival nodules, keratoconjunctivitis sicca, band keratopathy, cataract, chorioretinitis, retinal periphlebitis or neovascularisation, optic nerve disease, glaucoma or orbital involvement. Prognosis varies depending on the tissues involved.