Progressive fitting height: why the frame matters

Leave room for the intended zones

The lens design needs a reference position relative to each eye. Fitting height records a vertical relationship in the frame as actually worn. It is not simply the frame’s total depth. If the frame moves, the relationship changes. Enough usable frame depth is also needed for the selected design, but more depth alone does not correct an inaccurate measurement.

Progressive designs have fitting requirements that help preserve usable viewing zones. ZEISS explains that minimum fitting heights protect access to the near area. A frame that looks attractive in a photograph may not suit the chosen lens design.

Measure the pair you will wear

Discuss fitting while wearing the selected frame in its adjusted position. The useful question is not simply how tall the empty frame looks, but whether the proposed design works with your measured position. Ask the dispenser to explain the measurements being ordered.

Avoid choosing a universal number

Our editorial advice is to ask about the exact lens design’s requirements rather than copying a minimum height from another brand or an online post. If the frame is unsuitable, compare a different frame or design before the lenses are made.

Recheck after fit changes

At collection, ask how the frame should sit and whom to contact if it starts slipping. Note whether moving the frame changes access to reading or screen vision. Bring the actual pair back for adjustment rather than estimating new measurements yourself.

A worked example

Compare a height measured before adjustment with one measured after the nose pads and temples are fitted. If the frame position changed, reusing the earlier number may misplace the zones. For this reason, copying a friend’s fitting height for the same frame model is not a shortcut: faces, pupil positions and wearing posture differ.