Abstract
BACKGROUND: To report the case of failed surgical excision of optic nerve drusen (OND). METHODS: Case report. A 53-year-old woman presented with bilateral OND leading to progressive field defects and LE light perception and RE 20/25 vision. A vitrectomy was performed on the legally-blind left eye to test the resectability of OND. RESULTS: The removal of superficial OND failed because the singular-appearing superficial OND presented as one large mass with multiple excrescences on its surface. Retinal vessels passed through it, which made an excision impossible. CONCLUSION: OND cannot always be removed surgically, due to their variable consistency and hardness.