What it is
Many people assume eye spacing means the gap between pupils, but intercanthal distance actually measures the space between the inner corners of the two eyes, where the eyelids meet near the nose. This is the medial canthal distance, often shortened to ICD.
It sits alongside interpupillary distance (IPD), outer canthal distance (OCD), and palpebral fissure length as one of the standard reference points used in anthropometric descriptions of the eye area.
On this page
How it looks
Quick visual profile
How to Recognize Intercanthal Distance
Look at the feature under neutral lighting, with a relaxed expression, in a relatively straight-on view.
- ✓ Inner corner position: Trace where each upper and lower eyelid meet nearest the nose bridge — that point is the medial canthus.
- ✓ Bridge width relative to corners: Compare the visible skin width between the two inner corners to the width of one eye opening.
- ✓ Symmetry check: Look at both sides in the same frame; ICD is typically discussed as a left-right pair, not a single-eye measurement.
The clearest visual cue is the gap of skin directly between the two inner corners — that gap, not the outer corners or pupils, is what intercanthal distance actually describes.
Visual Proportions & Measurement
Intercanthal distance is the span between the inner corners (medial canthi) of the left and right eye, measured across the nasal bridge.
It differs from interpupillary distance, which compares the centers of the pupils, and from outer canthal distance, which compares the outer eye corners instead of the inner ones.
In photos, this shows up as the visible width of skin between the two inner corners relative to the width of one eye — a narrower gap reads as closer-set eyes, a wider gap reads as more spaced-out eyes.
Digital facial analysis tools estimate these markers as visual references, not medical findings.
What People Commonly Get Wrong
| Common Claim | What the Feature Actually Describes |
|---|---|
| “Intercanthal distance is the same as eye spacing measured pupil to pupil.” | ICD compares inner corners, not pupil centers — that comparison is interpupillary distance instead. |
| “Wide-set or close-set eyes are a single fixed number everyone can be sorted into.” | ICD is one proportional reading among several (IPD, OCD, fissure length) that together shape how eye spacing looks in a photo. |
| “You can estimate ICD accurately from any angled selfie.” | Angle, tilt, and lens distortion change how far apart the inner corners look, so straight-on framing matters for a visual read. |
| “Eye spacing terms only matter for medical assessment.” | These terms also come from photography and anthropometric description, used to talk about proportion, not to flag a medical issue. |
Explore It on Your Photo
FaceAuraAI uses visual analysis to help you explore the appearance of these features; results are not a medical assessment.
Related Aesthetics Terms
Frequently Asked Questions
Is intercanthal distance the same as eye spacing?
Intercanthal distance is one specific way to describe eye spacing — the gap between the inner corners — rather than the only definition of that broader term.
How is intercanthal distance different from interpupillary distance?
Intercanthal distance compares the inner eye corners across the nasal bridge, while interpupillary distance compares the centers of the pupils.
Does lighting or camera angle change how intercanthal distance looks?
Yes, a tilted head or wide-angle lens can visually widen or narrow the gap between the inner corners even though the underlying landmarks have not moved.
Can eye spacing look different between two photos of the same person?
It can appear different because framing, distance from the camera, and expression all shift how the inner corners read against the nose bridge.
Sources
This term draws on the anthropometric reference below for how intercanthal distance is described in eye-area measurement.