sudden eyesight decline in one or the two eyes. Sudden eyesight decline in one or the two eyes is usually a sign of a significant eye challenge identified as non-arteritic anterior ischemic optic neuropathy (NAION).Th?c ph?m ch?c n?ngD??c m? ph?mCh?m sóc cá nhânThu?cTrang thi?t b? y t???t thu?c onlineTrung tâm Tiêm ch?ngirregular vision, for e