What invention was suggested to man by a drop of water?

A drop of water gave a man an idea to create such an invention as a magnifying glass, also this device is called a magnifying glass. For the first time, such magnifying devices began to be observed about 2000 years ago. Already a more accurate model of a magnifying glass appeared in the 13th century and it is believed that the inventor was the English philosopher Roger Bacon. At the same time, many analysts believe that Arab scientists could have invented this device.