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.
Hives Definition. Hives (also called urticaria) is a condition that causes a noticeable skin rash with itchy, raised, pale red bumps. Hives are the result of allergic triggers in most cases. Other names for hives include welts, nettle rash, wheals, heat rash. There are 2 classifications of hives: acute and chronic.