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A member asked:
I got new glasses with bifocals. things still aren't crisp. old one were for farsighted&had a prism in them. new1's don't have rprism. do i need prism?
3 doctors weighed in across 2 answers
Yes: Prism is needed to keep your two eyes better coordinated. Prism in a bifocal is tricky because the prism you need for distance vision is usually different from what you may need for close work/reading.
Answered 2/2/2015
5.2k views
Thank
Most likely yes: Prisms adjust for minor muscle imbalances to alignment. If your old spectacles has a prism, your new ones will as well.
Answered 12/10/2013
5.1k views
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