she has been treated with itravitral injections of vancomycin, dexamethasone and amikacin followed by iv infusion of cefartroxone, wancomycin, amikacin and prednisolone for 5 days . hrly drops of pridnisolon,homatropin an vigamox and hypersol. vision has still not improved. please tell what are chances of regaininlg of normal vision.