Developed during the 16th century, allowed projected images to be focused.

Developed during the 16th century, lens allowed projected images to be focused. A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. They are part of the camera and serve to better define the image.

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."