What does a prism do in glasses?

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Tags

1. #thinking
2. #together
3. #without
4. #excellent
5. #vision
6. #patients
7. #aligning
8. #lenses
9. #contact
10. #prescribe
11. #images
12. #glasses
13. #results
14. #working
15. #require
16. #prism
17. #strain
18. #double