Spectacle RX -4.25 -.75 X 090
Contact Lens RX -4.00 -.75 X 090

If X is the spherical and Y is the Cylinder what powers are they?

No cyl at 90 correct? Y would be -4.25
all in effect at 180. X would be -5.00 no?

Also, do you round up or down when simply splitting -1.75 at 45 or 135?