Ophthalmology Down beat nystagmus could be due to-a) Cerebellar lesionb) Arnold – Chiari malformationc) Optic neuritisd) Pontine lesion A ac B a C ab D bc 💡 Explanation Down beat nystagmus could be due to-a) Cerebellar lesionb) Arnold - Chiari malformationc) Optic neuritisd) Pontine lesion ✓ Correct Answer: C. ab