Further, African Americans did not have the freedom to choose where and how to live due to the effects of state-sponsored restrictive covenantsâlegally binding contracts making it illegal to rent, sell, or lease housing to black people (in some regions it included other nonwhites).
Nonarteritic anterior ischemic optic neuropathy (NAION) is the most common clinical presentation of acute ischemic damage to the optic nerve.Most treatments proposed for NAION are empirical and include a wide range of agents presumed to act on thrombosis, on the blood vessels, or on the disk edema itself.onarteritic anterior ischemic optic neuropathy (NAION) is the most common clinical presentation of acute ischemic damage to the optic nerve.
Non-arteritic anterior ischemic optic neuropathy (NAION) refers to loss of blood flow to the optic nerve (which is the cable that connects the eye to the brain).This condition typically causes sudden vision loss in one eye, without any pain.inally, it is called an âoptic neuropathyâ because it is an injury to the optic nerve, which disrupts the ability of eye to send information to the brain. The eye examination for a patient with NAION shows swelling of the optic nerve (arrows), due to injury from. reduced blood flow.