- Of what material(s) are glasses made?
- What common/possible materials for frames?
- What common/possible materials for lenses?
- How are lenses made?
- How does a prescription define the process of crafting a lens?
- Where are lenses made?
- How do lenses physically correct vision/bend light?
- What kind of technology advanced led to better vision correction?
- When did people start wearing glasses on their face?
- When did glasses develop a luxury market?
- Non-functional glasses, does a market exist?
- What social implications exist around people who wear glasses?
- What are reasons people need glasses?
- What are issues users of glasses experience in the their daily life?
- What companies make glasses?
- How much do glasses cost?
These glasses are from Zenni Optical
I got them on 12.20.2015