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.
77 Followers. A. No, hives are not contagious. Hives, or urticaria, are a rash of pink or red, raised spots that itch. Hives may be due to an allergic reaction, an infection, or an unknown cause.They generally appear within minutes and disappear within a few hours.7 Followers. A. No, hives are not contagious. Hives, or urticaria, are a rash of pink or red, raised spots that itch. Hives may be due to an allergic reaction, an infection, or an unknown cause. They generally appear within minutes and disappear within a few hours.