Clinical features of occult indirect optic nerve injury

Objective To study the clinical features of occult indirect optic nerve injury. Methods Clinical features, including chief complaint, characteristics of trauma, changes in vision, pupil and fudus, and visual field, vision-evoked potential, visual contrast sensitivity, in 15 patients （18 eyes） admitted to our department in June 2005 -June 2009 due to occult indirect optic nerve injury, were retrospectively analyzed. Results The diagnosis of all patients was missed due to their nearly normal vision and ocular fundus at the first visit to our department. The clinical features of occult indirect optic nerve injury included a slight decrease in vision after injury, sense of light and color, relative afferent defect of pupils, and abnormal visual field, vision-evoked potential, visual contrast sensitivity. Conclusion In order to avoid missed diagnosis of occult indirect optic nerve injury, relative afferent defect of pupils, visual field, vision-evoked potential, visual contrast sensitivity should be carefully examined in patients with blunt trauma on eyeballs, especially on the brow, if they have insignificant changes in vision but have change in color and color degree.