How come some people have glasses and others don’t?

Question: How come some people have glasses and others don't?
- Keywords:
  glasses
Asked by FlossyFoster to Andy, Duane, Giovanna, Katie, Theresia on 17 Nov 2014.
- Theresia Mina answered on 17 Nov 2014:
  
  People are born with different eye ball shapes, and also depending on your habit and genetics, some people are born with better eyesight than others.
- Duane Mellor answered on 17 Nov 2014:
  
  I think it is linked to how eye muscles change the shape of the lens, this is different in different people.

Anya commented on 17 Nov 2014:

People have different eyes and some people need glasses and some people don’t.

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- Anya commented on 17 Nov 2014:
  
  Very good answer.
  
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Question: How come some people have glasses and others don't?