What eyewear fitting can and cannot fix

01 · ADJUSTABLE

Some variables can be changed through fitting

Metal frames allow relatively fine adjustment of nose-pad position and angle, temple spread and rear bends.

Plastic frames can also be adjusted at the temples and rear bends depending on material and construction.

Mild tilt, looseness and pressure often improve with fitting.

The amount of safe adjustment depends on material and construction. Metal frames differ in section, hinge design and processing, while plastic frames vary in material, thickness and heat response. It is more accurate to judge the specific frame than to assume that all metal can be adjusted and all plastic cannot.

02 · FRAME SIZE

Fitting cannot completely change the actual frame size

Forcing a frame that is far too narrow to stay widely spread can place continuous stress on the hinges and front.

Forcing an overly large frame much narrower can reduce stability and distort its shape.

When the size mismatch is large, frame selection is the more fundamental issue.

If overall frame width is far from the wearer’s needs, spreading or narrowing the temples does not relocate the rims, hinges and bridge as a whole. Large corrective bends can introduce new stress at the hinges or front, so increasing adjustment magnitude should also trigger a reconsideration of frame selection.

03 · BRIDGE DESIGN

Bridge design can also be a structural limit

If a plastic bridge is substantially mismatched to the nose, temple fitting alone may not solve the problem.

Adhesive pads or custom nose-pad modifications can help selected frames, but not every frame is suitable and structure, material and machining allowance need to be considered.

Bridge position, width and angle are often largely built into the frame. Add-on pads or modification may improve contact, but they can also change lens position, appearance and attachment reliability, so a workaround should be distinguished from a structural solution.

04 · LENS WEIGHT

Lens and front weight can also limit fitting

Very large or thick lenses, or a heavy frame front, do not become lighter simply by tightening the temples.

A high prescription does not automatically mean high weight, so lens size, material, design, thickness and frame construction should be considered together.

A weight problem is not fundamentally solved by gripping harder at the temples. When the front is heavy or its center of mass sits too far forward, increasing rear restraint can simply increase pressure; lens size and thickness, frame size and material may need to be reconsidered.

05 · RESELECT

Choosing a different frame can be the better solution

The purpose of fitting is not to force every frame onto every face.

When the required correction exceeds the safe or practical adjustment range, choosing a frame better matched to the face and lens requirements can be more stable.

Recognizing the limits of fitting is part of good dispensing. If repeated adjustment keeps changing the structure or the same complaint quickly returns, reassess frame suitability, component condition and lens factors instead of simply applying more force.

SOLUTION GUIDE

Key points at a glance

GLANOS FITTING CHECK

GLANOS fitting check order

1. Front
   Check the frame reference state.
2. Nose pads / bridge
   Determine the realistic adjustment range at the nose.
3. Width
   Compare total frame width with face width.
4. Temple bend
   Check whether the rear fit is compensating for a front problem.

CAUTION

Repeating fitting does not solve every problem

GLANOS EYEWEAR

There is a reason glasses feel uncomfortable.