Two questions regarding a patient with prism correction:
- Generally, I recommend that patients visit an OD rather than MD (ophthalmologist) to get a refraction. But if someone has prism correction in their current lenses, would it better for them to have the new refraction done by an ophthalmologist?
- If a patient is wearing bi-focals with prism correction and obtains a new Rx, and the patient is sort of on the border-line between add power of +2.25 or +2.50 (but the sphere/cylinder correction is the same), it is normally the case that the prism correction would remain exactly the same for both Rx's (one with 2.25 add and the other with 2.50 add)?
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