How would you solve this unequal vertex distance? 

What is the prescription and amount of induced prism, rounded to the nearest quarter, based on the following information: Lensometer readings: A = +1.75 D B = 090 C = -1.25 D OC Height ordered: 20 mm OC Height received: 22.5 mm

Eyelashes are touching the lenses. What are the possible solutions? 

What is the base direction of the prism in the previous question? OS +3.75 -2.50 X 167 The patient is looking through the lens 5 mm in from the OC.

The misalignment in the above picture would indicate that the vertex distance is uneven.

Given the following specifications, calculate the change in the vertex distance.  Round your answer to the nearest millimeter.     Prescription = -15.50 D    Effective power = -14.50 D

Calculate the  net vertical and horizontal prism at the NVP.  Round your answer to two decimal places.

The patient has selected a frame with a pupil center height of 26 mm.  The pantoscopic tilt of the frame is 4 degrees.  Calculate the MRP height.

Calculate the vertical prism caused by the distance portion of the lens.  Round your answer to two decimal places.

What mono PD should be ordered for the left lens?  Round your answer to the nearest whole number.