It is appropriate to pre-adjust frames to fit progressive lenses, and to slightly increase both pantoscopic and face form tilt.

• A. True
• B. False
• C. Only pantoscopic tilt
• D. Only face form tilt

Answer: (A)

When fitting progressive lenses, the frame must be oriented to the wearer's face so the lens zones align with the eyes through typical viewing angles. Pre-adjusting frames means setting the frame on the face with proper pantoscopic tilt, face-form tilt, and back vertex distance before the lenses are mounted. This careful setup ensures the progressive corridor—the gradual power change from distance to near—lines up with the pupil for both looking straight ahead and when looking down to read.

Slightly increasing both pantoscopic tilt and face-form tilt helps position that progressive zone more accurately in front of the pupil across common how-we-look tasks. A bit more tilt shifts the lens geometry so the reading area sits where the eye naturally intersects it, reduces peripheral distortions, and minimizes unintended prismatic effects as gaze shifts between distances.

So yes, pre-adjusting frames and slightly increasing tilt in both dimensions supports accurate lens alignment and wearer comfort with progressive lenses.