“…A clinical severity score has been proposed for this ocular complication: 0 = absence of ocular surface disease, 1 = presence of conjunctival hyperemia, 2 = presence of conjunctival hyperemia associated with serosanguinous discharge, 3 = presence of pseudomembranous conjunctivitis, 4 = presence of pseudomembranous conjunctivitis associated with corneal epithelial sloughing (Jabs et al, 1989). Recent evidence describes that the severity of ocular surface disorders are correlated with the severity of systemic aGVHD, but it does not affect the patient's survival (Liu et al, 2016).…”