Another unsolved mystery remains the eyes of Egyptian statues, or rather the secret of their manufacture from small fragments of rock crystal. These lenses were usually placed in the eye sockets of sculptures made of wood or limestone. The craftsmanship of these lenses is amazing, it is simply amazing, and this clearly speaks of their creation using machining and specialized lathes.
The most striking representative of such statues is the statue of Pharaoh Horus, made of wood. Eyes are inserted into it, which are frighteningly similar to the eyes of a living person. They change color, from blue to smoky gray, depending on the angle from which you look at them. They also mimic the real architecture of the retina pretty closely!
Research carried out by Professor Jay Enoch, who represents the University of Berkeley, has indicated an amazing similarity of these glass dummies to the shape and optical properties of the human eye.
Jay Enoch suggested that Egyptian masters reached the peak of their art in lens processing by about 2500 BC. Then this unique technology is used less and less, and then it is completely lost.
These lenses were inserted not only into the eyes of the Pharaohs, but also into the eye sockets of animals. An excellent example is the cat-shaped cosmetic vessel with crystal eyes bordered with copper. This find dates from about 1991-1783 BC.
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There is only one logical explanation for such a development of events - these quartz blanks for the eye sockets were simply not borrowed by the Egyptian craftsmen. And as long as they had reserves, the "technology" lived on, and as soon as they ran out, "the technology became lost."