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 may include the following (either alone or in combination): 1  Hives. 2  Itchiness. 3  Flushing. Swelling in areas away from the sting.  Dizziness or a sharp drop in blood 1  pressure. A hoarse voice, swelling of the tongue or difficulty swallowing.  Hives, itching and swelling in areas other than the sting site.