If recognized early , many cases of endophthalmitis can be successfully treated by injection of antibiotics directly into the eye i.e., intravitreal injection of antibiotics . While most forms of glaucoma do not cause eye pain , this form of glaucoma does cause a severe , boring eye pain . In addition to the appearance of a red eye with eye pain , other symptoms include eyebrow acheing pain , blurred vision , seeing halos around bright lights , and nausea and vomiting . Retinal artery occlusions can involve either the central retinal artery or smaller branch retinal arteries . Retinal artery occlusions are one cause of sudden , painless vision loss in one eye .
Some inflammatory diseases affecting small arteries can lead to arterial occlusion .
Temporal arteritis is one such example of an inflammatory arteritis causing blindness from retinal artery occlusion . Other examples are polyarteritis nodosa , and Behcet's disease . Blood clots can form on diseased arterial walls or diseased heart valves , and small pieces of clot can break off and float in the bloodstream , until they become lodged in retinal arteries . Similarly , cholesterol plaque formations on the walls of diseased carotid arteries in the neck may break off and flow through the bloodstream until they become lodged in smaller retinal arteries . Patients may experience transient , recurrent visual loss symptoms as a precursor for a major event with resulting permanent visual loss from an arterial occlusion .