Onset of anisocoria: Old patient photographs often help to date anisocoria that is unaccompanied by other symptoms. Physical. Key aspects of the physical examination (eg, pupil size in light, pupil size in the dark, pupil reactivity to light and dark) help to localize the problem. Additional historical features such as pain, diplopia, ptosis, numbness, ataxia, dysarthria, or weakness help generate a differential diagnosis.
Mount Agung last erupted in 1963 (see information box in this article). This was one of the largest 20th century eruptions anywhere in the world. Historical eruptions of the volcano are poorly recorded, but there was certainly one in the 1820s.
The ash and aerosol clouds from large volcanic eruptions spread quickly through the atmosphere. On August 26 and 27, 1883, the volcano Krakatau erupted in a catastrophic event that ejected about 20 cubic kilometers of material in an eruption column almost 40 kilometers high.hat Benjamin Franklin observed was indeed the result of volcanic activity. An enormous eruption of the Laki fissure system (a chain of volcanoes in which the lava erupts through a crack in the ground instead of from a single point) in Iceland caused the disruptions.