Glasses add new horizontal boundaries and visual area to the center of the face, so frame depth and wearing height can change perceived vertical proportions, but the effect is not identical on every face.
01 · VERTICAL DEPTH
A deep frame occupies more of the central face
A deep frame extends farther from the eye area toward the cheeks and creates strong upper and lower boundaries.
This can visually divide the central face into more distinct zones and change the perceived vertical proportion.
Whether that reads as shorter, heavier or simply more frame-dominant depends on the face and wearing position.
02 · SHALLOW FRAME
A shallow frame leaves more uninterrupted vertical facial area
With a shallow lens depth, more of the cheek and jaw area remains visually continuous below the frame.
On some faces, this uninterrupted vertical area can make the face feel longer.
Horizontal width and color contrast also contribute, so the direction is not fixed.
03 · WEARING HEIGHT
The same frame can look different at a different wearing height
If the frame sits lower than intended, the gap between the brows and frame increases and the lower rim also moves downward.
That can change the proportions from the design's intended position.
Compare designs only after the wearing position is stable.
04 · FRAME LINE
Upper and lower rim geometry also changes how the face is divided
Square frames with strong straight lines create clearer horizontal boundaries, while round frames wrap the center of the face with more curves.
That changes how the frame interacts with vertical facial lines even when the nominal depth is similar.
05 · PROPORTION
Judge how much of the actual face the frame occupies
Face length alone is not enough to determine lens depth.
The brows, eyes, nose, cheekbones and actual frame height all influence the result.
There is no universal lens-depth formula for long or short faces.
SOLUTION GUIDE
Solutions at a glance
Compare B dimension and the actual lower-rim position.
Check shallow-frame proportion and wearing height.
Check bridge or nose-pad fit before judging the design.
GLANOS FITTING CHECK
GLANOS fitting check order
- Fit
Create the normal wearing height first. - Vertical depth
Check B dimension and lower-rim contour, not only A dimension. - Facial proportion
Compare the area occupied relative to the brows, cheekbones and jaw. - Design
Then judge how the frame visually divides the face.
CAUTION
Do not choose lens depth from face length alone
Perceived vertical proportion also depends on wearing height, brow and cheekbone position, horizontal width and color contrast.
GLANOS EYEWEAR
There is a reason glasses feel uncomfortable.
face shape glasses · lens depth · B dimension · frame proportion · eyewear design · wearing height · frame selection