Permanent facial nerve palsy causing lagophthalmos leads to serious ocular complications. The aim of the study was to evaluate the factors affecting the eye condition in patients with this disease. The study group included 59 middle aged people of 55.5+–17.4 years of age: 40 females (67.8%) and 19 males (32.2%) with unilateral permanent paralysis of the facial nerve. The evaluated factors were: patient’s age, etiology and duration of facial nerve palsy, size of lagophthalmos, Bell’s phenomenon, corneal sensation, Schirmer’s test for BCVA and cornea damage level. The Kruskal‑Wallis equality of populations rank test showed a significant influence of age and Bell’s phenomenon on BCVA, and of Bell’s phenomenon and corneal sensation on the severity of exposure keratopathy (p <0.05). Etiology and duration of facial nerve palsy, size of lagophthalmos and Schirmer’s test were not statistically significant for BCVA and cornea damage level in the study group. Bell’s phenomenon and corneal sensation proved to be the most important prognostic factors affecting the condition of the eye in the examined group of patients.