Free · runs on your device
Canthal tilt test
The angle of each eye’s corner-to-corner axis, measured in degrees and corrected for head tilt. Typical tilt runs +2° to +6°, and both eyes differing slightly is normal.
CostFree
TimeUnder 1 min
SignupNone
DataStays on device
478-point landmark map
Step 1 of 2 · your photo
Add a photo to measure
Face the camera straight on, hair off the face, even light, no tilt.
How it works
Add your photo
Camera or upload — either works.
Mapped in your browser
478 landmarks, entirely on your device.
Your measured result
Numbers and lines drawn on your photo.
On-device · never uploaded
478 landmarks
Free · no signup
The science
What canthal tilt is and how it is measured
01
Canthal tilt is the angle of the line connecting the medial canthus (inner eye corner) to the lateral canthus (outer corner), relative to horizontal. When the outer corner sits higher, the tilt is positive; level is neutral; lower is negative. This tool locates all four corners with a face-landmark model, corrects for your head tilt using the face midline, and reports each eye separately in degrees.
02
Population studies of eye anatomy put typical canthal tilt around +2° to +6°, varying with ancestry, age, and sex — and a degree or two of left-right difference is normal, not a finding. Because the number is small, measurement conditions matter: a head tilt of 3° changes an uncorrected reading by 3°. The tilt correction here removes most of that, but a straight-on photo still measures best.
03
Worth saying plainly: internet subcultures have turned canthal tilt into a beauty verdict. Anatomically it is just one measurement among many, changes with age as lateral support relaxes, and no makeup or exercise changes the anatomy — eyeliner and lash styling change the visual impression, which is the practical takeaway.
Negative canthal tilt: the honest version
Negative canthal tilt — the outer eye corner sitting below the inner — became an internet fixation, and most of what is written about it is nonsense. The anatomy: tilt is set by where the lateral canthal tendon anchors to the orbital rim, it varies by ancestry and family, and it drifts slightly downward with age as lateral support relaxes. Population studies put typical adult tilt around +2° to +6°, but negative values occur in healthy faces at meaningful rates, and no study links them to anything medical in isolation.
The "negative tilt ruins a face" framing comes from looksmaxxing forums scoring features in a vacuum. In real faces, tilt reads as part of a whole — plenty of widely admired faces measure neutral-to-negative. If yours measures negative and it bothers you: winged liner, lash lifts mapped to lift the outer third, and brow shaping raise the *perceived* tilt by several apparent degrees for free. Surgery (canthoplasty) exists but is a genuine operation with genuine risks for a cosmetic preference.
Why measured tilt beats mirror guessing
Self-assessed canthal tilt is unreliable for a physical reason: a head tilt of 3° changes the apparent tilt by 3°, and nobody holds their head perfectly level in a mirror. This tool fits your face midline from the full landmark set and measures each eye against it, which removes most of the posture error — and reports each eye separately, because a degree or two of left-right difference is the human norm, not a finding.
FAQ
Common questions
What is a normal canthal tilt?+
Roughly +2° to +6° positive tilt is the common range in anatomical studies, with plenty of healthy variation on both sides of it. Slightly different angles per eye are typical.
Is negative canthal tilt bad?+
No — it is an anatomical variant, common with age and in many ancestries. The “negative tilt ruins a face” idea comes from looksmaxxing forums, not from facial-aesthetics research.
Can canthal tilt be changed?+
Anatomically only by surgery (canthoplasty), which is a real procedure with real risks. Visually, winged liner, lash lifts, and brow shaping shift the perceived tilt by a few apparent degrees for free.
What canthal tilt do models have?+
The "hunter eyes" claim says +5° to +8°, but measured data on working models shows the same spread as everyone else — the look attributed to tilt is mostly brow position, lid exposure, and lean. Tilt is one small input to an eye area with a dozen.
Does canthal tilt change with age?+
Yes, slightly downward — the lateral canthal tendon and surrounding support relax over decades. It is one reason the eye area reads older; lash and liner techniques that lift the outer corner counteract the read.
Can exercises change canthal tilt?+
No. The tilt is tendon-and-bone anchoring, not muscle tone. Face-yoga claims about lifting the canthus have no supporting evidence — makeup changes the perception, surgery changes the anatomy, nothing in between does either.