Autoimmune diseases are rare but known causes for optic neuritis
. As per the history you have provided your daughter had a episode of optic neuritis in right eye which was treated with methylprednisonolone and oral steroids
. But unfortunately the vision in right eye has not recovered.
Since left eye is showing narrow field of vision, it requires further evaluation to find out the cause by visual field
examination. Steroid induced glaucoma
need to be ruled out.
Since the patient is having involvement of both the eyes some other rare autoimmune diseases like systemic lupus erythematosus
needs to be ruled out.
All these are necessary because every effort has to be made to preserve the vision in left eye as the vision in right eye is totally lost.