Mirrors are primarily used to see our own _______________

Mirrors are found in _______________ and _______________ .

Mirrors are also found in _______________ and _______________.

The first mirrors date back at least _______________ years

The first mirrors were made of black volcanic glass called _______________

The German chemist _______________ developed the first modern mirror.

He developed the first modern mirror in _______________.

He applied a thick layer of metallic _______________ to one side of a pane of glass

Today most mirrors are still made of _______________

Some people wear glasses because they have _______________ with their vision

Refractive errors make things look _______________

Two of the most common problems are _______________ and _______________

Historians believe glasses were invented in the late 1200s in ________________

Others believe glasses were invented much earlier in _______________

In the past spectacles were made of glass. Today spectacles are made of __________ __________

Plastic polymers make spectacles __________ and __________ than past spectacles that were made of glass.

A magnifying glass can be used to _______________ almost any object

A magnifying glass uses _______________ to enlarge an image

Philosopher and scientist ____________________ invented the modern magnifying glass in 1250.