According to Wikipedia, today's lenses are typically made from plastic, such as polycarbonate. Plastic is used in order to lessen the chance of breakage.
Eyeglasses.
bifocals?
Eyeglasses can be purchased several different ways. However, first we would recommend seeing an eye doctor for a thorough eye exam. Then you can go to many optical retailers or even or eyeglasses online. - find Integrity Vision Care on facebook
monolens
Edward Scarlett
they were made in the 1500s.
Wire
the first kind of eyeglasses was invented by Benjamin Franklin which the inventions was known as specs or specticals
quartz stone
They where made out of Metal and plastic the Plastic is called zlonite.
To make people see better.
Benjamen Franklin
Eyeglasses are made to correct the vision of people who can't see well. They work by changing the way light enters our eyes so that we can see better.
The frames were made from metal and the lens were made from crown glass.
Eyeglasses were originally made from two convex glass lenses with metal wrapped around them.
Horn rimmed eyeglasses are glasses with frames made of animal horn or plastic that looks like horn.
the eyeglass was made in 4 bc