in some cases , occlusion of the central retinal artery , prethrombosis of the central retinal vein , prolonged narrowing of the retinal arteries , perivasculitis , hemorrhage in the macular region , and inflammations of the anterior segment of the eye , resistance to therapy developed , and in some cases , lesions of the optic nerve causing visual loss of different degree and papillitis occurred .
C0007688
occlusion
C0035298
retinal