this is a 45-years old male patient who came to our facility complaining for reporting. the patient is post RTA. By examination, vision in the right eye is 20/20. In the left eye vision no perception of light. Anterior segment showed pupil is round, reactive in the right eye and dilated pupil in the left eye. Retina is normal. optic nerve showed pale optic nerve indicating optic atrophy in the left eye.