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.
Your body then releases a host of chemicals. One of them, histamine, is responsible for the symptoms that appear on your skin. Depending on the type of reaction and its severity, the duration of symptoms can vary from days to weeks. Hives are the red, itchy bumps that show up due to a food or drug allergy.They normally go away after a few days. However, some cases of chronic hives can last for months or years. Until hives go away, you can relieve symptoms using antihistamines.our body then releases a host of chemicals. One of them, histamine, is responsible for the symptoms that appear on your skin. Depending on the type of reaction and its severity, the duration of symptoms can vary from days to weeks. Hives are the red, itchy bumps that show up due to a food or drug allergy.