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.
On the BÃ¡rÃ°arbunga gradual caldera collapse. The eruption in Holuhraun in central Iceland in 2014 - 2015 was the largest seen in Iceland since 1783. The ice-filled caldera of BÃ¡rÃ°arbunga central volcano collapsed during the eruption as 1.9 kmÂ³ of magma flowed laterally from a magma reservoir under the volcano. Eruptions of this type are not common.