Fig. 15. A. A 48-year-old woman with dysthyroid optic neuropathy. Visual acuity right eye 6/24, left eye 6/9. Color vision right eye 1/12, left eye 10/12--Ishihara plates. Goldmann visual fields showed central scotomas in both eyes. Hertel measurements right 25, left 24, base 102. B. Preoperative axial CT scans showing apical crowding and proptosis.