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Reviewed June 30, 2026
What is interpupillary distance?
Interpupillary distance is the gap between the centres of your two pupils, the simplest read on how far apart the eyes sit. Most people describe the same trait in plainer words: wide set eyes or close set eyes. When the gap runs unusually wide it is called hypertelorism; unusually narrow, hypotelorism. It is one of the first things you notice on a face, because the spacing of the eyes sets the tone for everything around them.
How It's Measured
How is interpupillary distance measured?
Interpupillary distance is the straight-line gap between the centre of the right pupil and the centre of the left pupil, taken on a front-facing photo with the eyes looking ahead. It is the most direct way to put a number on eye spacing, and it is read against the rest of the face rather than on its own.
- Pupil centres: the two points the line connects, which is why a relaxed, forward gaze matters when the photo is taken.
- Intercanthal width: the related gap between the inner eye corners, the soft-tissue distance clinicians lean on when the pupils are hard to mark.
- The rule of fifths: split the face into five equal vertical columns and each eye should fill roughly one fifth, with the gap between the eyes about one eye wide.
Read against the face, the interpupillary distance tells you whether the eyes sit balanced, wide, or close. A gap wider than one eye width reads as wide set eyes; narrower than that reads as close set (Naini, 2011).
Moving the eyes farther apart, a hypertelorism look, widened the interpupillary distance from 58 mm to 62 mm against an unchanged face width. Same identity, same lighting, same framing.
Why It Matters
Why does interpupillary distance matter?
Eye spacing is one of the loudest signals on a face. We read average, symmetric layouts as attractive, and the spacing of the eyes is a big part of what makes a layout read as balanced (Jones et al., 2007). An interpupillary distance close to the rule-of-fifths ideal tends to look harmonious; push it well wide or well narrow and the whole midface starts to feel off, even when nothing else has changed.
This is also where the clinical names matter. A noticeably wide gap is hypertelorism, a narrow one hypotelorism, and the related telecanthus describes inner eye corners that sit too far apart (Naini, 2011). They carry weight beyond aesthetics. Marked hypertelorism can flag an underlying craniofacial condition, so a very wide gap is measured properly in clinical assessment rather than eyeballed.
There is no single correct number, though. Normal eye spacing is defined as a range, usually the population mean plus or minus two standard deviations, and that range shifts with sex and ancestry (Naini, 2011). A figure that reads as wide set on one face can sit comfortably inside the norm on another, so the cards and table below are working ranges, not a verdict.
60–68 mm
Men
58–65 mm
Women
58–68 mm
Typical Range
Approximate adult interpupillary distance. Eye spacing is judged proportionally and varies with individual facial structure and background.
Demographic Variants
Ideal Interpupillary Distance by Demographic
Ideal interpupillary distance shifts by sex and ancestry, so eye spacing is read relative to the face it sits on, not against one fixed number. Each row links to the source.
Population | Eye spacing tendency | Source |
|---|---|---|
Men (adult) | Wider pupil gap on average, tracking larger overall face size | |
Women (adult) | Slightly narrower gap, in proportion to a smaller face | |
European | Classic rule-of-fifths layout used as the historical reference | |
East Asian | Often a wider intercanthal gap with a flatter nasal bridge | |
Cross-population | Eye-region spacing is a recognised axis of facial variation worldwide |
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Your Questions
Frequently Asked Questions
For adults the interpupillary distance usually falls between about 58 and 68 mm, with men a few millimetres wider than women on average. Normal is defined as a range rather than a single value, typically the population mean plus or minus two standard deviations, so a gap inside that band counts as normal eye spacing (Naini, 2011).
Mildly wide set eyes can read as striking and are common among models, but the face still tends to look most balanced when the eye spacing sits near the rule-of-fifths ideal of one eye width between the eyes. Attractiveness tracks with average, symmetric layouts, so a gap close to that norm usually reads best (Jones et al., 2007). Pushed far past it, wide set eyes start to read as hypertelorism.
Wide set eyes are mostly down to the underlying bone, the width of the orbits and the midface they sit in, so the trait is largely inherited. Marked hypertelorism, a true increase in the distance between the bony orbits, can also accompany craniofacial conditions, which is why a very wide gap is assessed clinically rather than treated as cosmetic alone (Naini, 2011).
Interpupillary distance is measured as the straight-line gap between the centres of the two pupils on a front-facing image with a relaxed, forward gaze. When the pupils are hard to pinpoint, clinicians use the related intercanthal width between the inner eye corners instead, then read both against the rule of fifths to judge whether the eye spacing is balanced (Naini, 2011).