What is eye spacing?

The intercanthal distance, from inner corner to inner corner, expressed as a ratio of palpebral fissure width, the horizontal length of one eye.

How Facemap measures eye spacing

All four canthal landmarks come from the same mesh, so the ratio is stable regardless of how far you sit from the camera.

What the typical range looks like

A ratio near one matches the classical one-eye-width reference. Wider and narrower spacing are both common and both read as distinctive rather than incorrect.

How to read your result

Eye spacing anchors how the upper face reads, so Facemap shows it alongside canthal tilt to describe the eye region as a whole.

The eye spacing formula: how we calculate it

Intercanthal width expressed in eye widths. Landmark numbers are MediaPipe Face Landmarker indices, and every distance is normalised to your own face so camera distance and image size cancel out.

dist(133, 362) / mean( dist(33, 133), dist(263, 362) )

Landmarks used

33, 133, 263, 362

Reference target

1.00, the one-eye-apart rule

Tolerance band

0.22

Your reading is compared with that published reference on a Gaussian match curve: score = round( 100 x exp( -0.5 x ( (reading - target) / tolerance )^2 ) ), clamped to 1 to 99. Basis for the reference value: published reference range for eye spacing. The headline Attractiveness Score works differently: all readings are corrected for head angle and expression, weighted by confidence and mapped onto a 1 to 100 scale by a model calibrated against a published research set of more than Facemap scans.

Read the full Facemap methodology, including how the 22 measurement categories combine into your Attractiveness Score.

Eye spacing reference table

Eye spacing ratio bands and how each one reads.

• Above 1.10Wide set

  Gap noticeably exceeds one eye width

• 1.00 to 1.10Slightly wide

  Common measured band

• 0.95 to 1.00Classical

  Matches the one-eye-width reference

• Below 0.95Close set

  Gap narrower than one eye width

Wide set versus close set eyes

Wide-set eyes spread the upper face and often read as open and youthful. Close-set eyes concentrate it and often read as intense and focused. Both are extremely common, both appear throughout faces regarded as striking, and Facemap describes which one you measure as rather than grading it.

Why the ratio is more useful than millimetres

An absolute intercanthal distance in millimetres depends on your head size and on how far you sit from the camera. A ratio does not.

• /Both spans come from the same 3D mesh in the same frame
• /Scale cancels out, so camera distance is irrelevant
• /Results stay comparable between scans and between people
• /The classical one-eye-width reference is expressed the same way

Eye spacing and the rest of the eye region

Spacing sets the horizontal geometry of the upper face and canthal tilt sets its inclination. Read them together, and add facial symmetry to see whether any difference between your left and right eye is structural or a capture artefact.

The eye spacing formula, step by step

The intercanthal distance calculator reduces four eye corner landmarks to a single, scale-independent ratio.

• /Locate the inner corner, medial canthus, of each eye on the 3D mesh
• /Measure the intercanthal distance between the two inner corners
• /Locate the inner and outer corner of one eye to get palpebral fissure width
• /Divide intercanthal distance by that eye width
• /Compare the ratio against the wide-set, classical and close-set bands