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Flashcards in History of Opticians Deck (8)
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1
Q

For what purpose was the Chinese Emperor believed to have worn spectacles in 2283 BC?

A

Knowledge and Authority

2
Q

Since the first lenses are plus or convex, what were they used for?

A

Reading glasses

3
Q

“Here lies the inventor of spectacles.” This famous tombstone is an early record documenting the use of spectacles, and can be found on whose tombstone?

A

Salvino d’Armate

4
Q

What were some of the materials that the earliest glasses were made of?

A

Bone, leather, wood

5
Q

When were the first minus lenses introduced?

A

16th century

6
Q

When were toric lenses introduced?

A

19th century

7
Q

Early spectacles did not have sidepieces or temples. How were they secured to the head?

A

With a chain or chord with weights on the end draped over the top of the ears

8
Q

Who was credited with inventing frames that included temples?

A

Edward Scarlett