Optic Nerve Sheath Anatomy - Ocular POCUS To know you are looking at the optic nerve and sheath you need to identify: 1. optic disc 2. retinal vessels with colour doppler 3. hypoechoic nerve 4. hyperechoic sheath 5. shadow on either side of the nerve sheath (which should not be included in any measurement) Dr. Ashley Miller @icmteaching #OpticNerve #Sheath #Anatomy #Ocular #POCUS #ultrasound #ophthalmology #labeled