DEMO — fictional range. Local brief only, NOT SENT. No personal data is collected or transmitted.
FIT
Three numbers decide whether a frame suits a face.
A frame is described by four measurements and fits according to three of them. Most returns trace to one of the three being wrong for the wearer rather than to a defect.
The four questions worth asking.
They are asked before the frame is chosen, because each one rules frames in or out.
- Lens width
- Against the face width, which decides whether the frame is too narrow or too wide
- Bridge
- Against the nose, which decides whether it sits or slides
- Temple length
- Against the distance to the ear, which decides whether it pinches or falls forward
- Face shape
- Which decides whether the frame suits, and is the only one of the four that is not a measurement
Where each decision comes from
| Measurement | What it decides | What it costs to get wrong |
|---|---|---|
| Lens width | Whether the frame sits within the face | Pressure at the temples, or a frame that slides |
| Bridge | Where the weight is carried | A frame that leaves marks or slips down |
| Temple length | Whether it reaches the ear and stays | Pinching behind the ear, or a frame that tips forward |
| Pantoscopic tilt | The angle of the front to the face | A lens that is centred wrongly for the wearer |
The expensive mistake.
Choosing by appearance. The frame is bought for how it looks, then adjusted repeatedly to make it comfortable, and beyond a point the adjustment is compensating for the wrong size.
And the one that looks harmless.
Ignoring pantoscopic tilt. It is invisible in a photograph and it decides where the optical centre of the lens sits relative to the pupil.