Shift value for Computer/Reading

[maid52]

I have a script with the readings

sp cyl Ax ADD INT
+1.50 -0.75 100 +2.25 +1.50

does this mean a shift of +0.75
Thus making the sp +2.25 ?

Optical store is saying something else

[lensmanmd]

No. Standard intermediate is 50%. The OD is requesting a 66% intermediate for your trifocals.

[maid52]

No. Standard intermediate is 50%. The OD is requesting a 66% intermediate for your trifocals.

This is an extended reader not a trifocal.

Should the sphere be +2.25 or +3.00 leaving either +1.50 or +0.75 for the reading section?

[lensmanmd]

The 66% rule still applies. Any competent optician will be able to transpose this for you. I’m assuming that you are not an optician?

[JGor]

You seem to be confusing the term 'shift' with 'add'. An extended reader with a +1.50sph(and the cyl x axis) and a shift of +0.75 would have an Rx of +1.50 at the fitting point and +0.75sph for the 'extended' part of the reader.
The Rx you have given is Distance, Reading add and Intermediate add so the rule lensmanmd is quoting to you applies.