Retinal hemorrhages are common at sleeping<unk> s > 5000m (16,000ft)
Incidence increases with<unk> er<unk>
High altitude retinopathy
Painful
Open-angle glaucoma
Arteritic anterior ischemic optic neuropathy
Traumatic optic neuropathy
Optic neuritis
Central retinal artery occlusion
Temporal arteritis†