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.
Whether your urticariaâbetter known as hivesâis temporary or chronic, skin that's itchy, red, and irritated is not only annoying but can also be painful. There are many reasons for the appearance of hives, but the science is the same: a response within the body triggers histamines and cytokines in the skin.