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.
They often feel itchy and may also have a burning/stinging sensation as well. The size of the hives range from the size of small point point dots to large patchy/circular areas. Often times hives are an allergic reaction to foods, insect stings, sun exposure, drugs, or plants that can cause an allergic reaction.