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.
Dear Itchy, Hives, or urticaria, are a common condition that results in raised, red, and usually itchy patches of skin (wheals) that appear suddenly and then later disappear without a trace. They can appear all over the body, but usually appear first on the trunk and upper arms and legs, and most of the time they last anywhere from 24 hours to a couple of days. They can range in size from small dots the size of pencil tip to patches covering large areas of the body. Hives typically cause itching, stinging, or pain. Hives are one of the body's responses to the presence of histamine or other chemicals in the blood. They are often, but not always, caused by allergies. During an allergic reaction, the body recognizes a substance (e.g., foods, medications, new soaps, lotions, and perfumes, pollen, or animal hair) or a trigger as a dangerous intruder and mounts an immune response to it.