Abstract
Optic nerve head drusen (ONHD) are calcified bodies in the optic nerve which are diagnosed incidentally during the ophthalmic examination. Patients with ONHD are usually asymptomatic, yet can be presented with blurry vision and transient visual obscurations. ONHD diagnosis can be challenging for ophthalmologists because clinically it mimics optic nerve disc swelling and can be misdiagnosed with papilledema or optic neuritis. For a proper diagnosis to be made, clinical examination supported by diagnostic tests as ultrasound B scan, optical coherence tomography (OCT), and computed tomography (CT) orbits are required. The presented case is a 38 year old healthy lady with ONHD presented with asymmetrical vision loss. Following clinical assessment and investigations, non-arteritic anterior ischemic optic neuropathy (NAION) secondary to ONHD was diagnosed.