The object of convergence is the directing of the yellow spot in each eye towards the same point, so as to produce singleness of vision; diplopia, or double vision, at once resulting when the image of an object is formed on parts of the retina which do not exactly. correspond in the two eyes.
Hives are red, itchy, slightly elevated swellings. Itching may be severe. Hives have clearly defined borders and may have a pale center. Typically, crops of hives come and go. One hive may remain for several hours, then disappear, and later, another may appear elsewhere.
Causes of Widespread Hives. 1  Viral Infection. The most common cause of hives all over the body is viral infections. 2  Bacterial Infection. Some bacterial infections can also cause hives. 3  Drug Reaction. An example is a penicillin rash.  Food Reaction. May be an allergy or a 1  coincidence. Bee Sting.