A 65 year-old jeweller is prescribed the following glasses for close work.
Right eye +5.00DS and 
Left eye +5.00DS

At work, he sees 10 mm below the optical centres of each lens.

a. What is the induced prism in each eye?

b. How much would the image of a piece of diamond be displaced if it were held
20 cm from the glasses?

c. If he were to pick up the diamond with a pair of forcep, would he reach above or below it?