what is with glasses that helps people see things better?

Question: what is with glasses that helps people see things better?
- Keywords:
  human,
  technology,
  vision
Asked by to Elaine, Darren, Anna on 24 Jun 2014. This question was also asked by .
- Zhiming Darren Tan answered on 24 Jun 2014:
  
  The lenses help the eyes to focus images better.

Question: what is with glasses that helps people see things better?