There are a few electrolyte abnormalities: hypokalemia, hypercalcemia, hyperkalemia and hypocalcemia. Hypokalemia is also referred to as low potassium. The main cause is loss of potassium in urine due to diuretic medicines. Diarrhea and vomiting can also contribute to hypokalemia.
The name of the first camera is camera obscura and is described to be the foundation on which most modern cameras are based on. Johann Zahn made the first camera, in 1685.
Using it to study perspective, Leonardo da Vinci provides the first detailed description of the pinhole camera in the Codex atlanticus (c. 1485). The term camera obscura was first used by the German astronomer Johannes Kepler in 1604.