Hunter eyes, fox eyes and canthal tilt: what eyelid surgery can and cannot change

Eyelid and brow surgery can change soft tissue, such as brow height and upper lid show, but not the bone of the eye socket that sets much of the canthal tilt behind "hunter eyes" and "fox eyes". Those labels are social media shorthand for how the eyes and brows sit on the face. This article explains each term in anatomical words, what the measurements say, what the "fox eye" procedures are and what has been reported about their complications, and how to choose a surgeon if you still want to ask the question.

What do "hunter eyes", "fox eyes" and "canthal tilt" actually mean?

Canthal tilt is the one measurable term: the angle of an imaginary line from the inner corner of the eye (the medial canthus) to the outer corner (the lateral canthus), compared with the horizontal. A "positive" tilt means the outer corner sits higher than the inner one. "Hunter eyes" and "fox eyes" are not medical terms.

As the trend uses them, "hunter eyes" usually means a low-set brow, little upper lid showing and a deep-set look, while "fox eyes" usually means a lifted, elongated outer corner and a higher outer brow. Each of those is really three separate anatomical features: where the brow sits relative to the bony rim above the eye, how much upper lid skin shows, and how the outer corner sits relative to the inner corner. Only the first two are mostly soft tissue. The third is held in place by the lateral canthal tendon, a small band that anchors the outer corners of the lids to the side wall of the eye socket (the orbit), which is bone.

That is why a single trend word is a poor starting point for a surgical conversation. A surgeon will ask which of the three features you mean, because each has a different answer.

What is a normal canthal tilt, and is there an ideal one?

No single ideal exists, and measured values vary with sex and ethnicity. A 2025 three-dimensional study of 46 Chinese and 101 Caucasian adults aged 18 to 30 measured a lateral canthal angle averaging about 32 degrees in Chinese men, 36 in Chinese women, 36 in Caucasian men and 38 in Caucasian women, and found that Caucasian participants had significantly larger canthal angles and canthal tilt values than Chinese participants.

Those figures come from one group of young adults, measured with one set of landmarks, so they describe a range of normal faces and not a target. The authors state their purpose plainly: periocular data differ by ethnicity and sex, and surgeons must take this into account when planning surgery. In other words, a face that looks "wrong" against a trend photograph may be well within the normal range for that face.

Preference research is a separate matter. In one experiment published in 2007, judges looking at digitally altered female faces preferred the version with the medial canthal tilt accentuated 93% of the time. That tells us how a small sample of judges responded to a photo edit under lab conditions. It does not tell us that a surgical change will look natural on a living face, or that anyone should want it.

Which parts of the look can eyelid surgery change, and which can it not?

Surgery can change soft tissue: the amount of upper lid skin, the height of the upper lid crease, some brow position, and the support of the outer lower lid. It cannot honestly change the shape of the eye socket, the position of the cheekbone or the length of the underlying bony structure, which set much of the tilt and the "deep-set" look.

This is the part I would like readers to take away. Three things are commonly mistaken for eyelid problems. A heavy brow can make the upper lid look hooded and the eye look lower and more closed, which is a brow position question that I discuss in my guide to brow lift options. A crease that is low or absent changes how much lid shows, which is covered in my article on double eyelid surgery. And an inner corner fold (an epicanthal fold) changes how the inner corner reads, which is a different operation, covered in the epicanthoplasty article.

What no lid or brow operation does is reposition bone. If the look you want depends on a different orbit or cheekbone shape, skin and tendon surgery cannot do what a different orbit would do, and pushing the soft tissue further to imitate it adds risk.

What are "fox eye" procedures, and what complications are reported?

"Fox eye" is the name given to three different approaches: thread lifts, which place threads under the skin to pull the brow or outer corner upward; lateral canthoplasty or canthopexy, which tighten or reposition the outer corner of the lids; and brow lifts, which raise the brow itself. They are not equivalent operations, and each has its own published complications.

Threads. A 2021 meta-analysis of 26 studies of facial thread lifting, covering the face in general and not only the eye area, reported pooled rates of swelling (35%), skin dimpling (10%), numbness or altered sensation (6%), visible or palpable threads (4%), infection (2%) and thread extrusion, meaning a thread working its way out through the skin (2%). Non-absorbable threads carried higher rates of altered sensation and extrusion than absorbable ones (7.6% against 1.6% for extrusion), and satisfaction fell from 98% straight after treatment to 88% later. The authors advised discussing before treatment that the lift may not last.

The outer corner. The published work on lateral canthal procedures is mostly about lower eyelid malposition, meaning a lid that sags, turns out or sits too low, which the procedures are used to correct or prevent. One retrospective series of 146 patients reported success in 86% by surgeon assessment and 91% by patient assessment, and listed the findings that should be recorded before choosing a technique, including the vector of the cheek and eye (negative in 62%) and the canthal tilt (neutral in 49%, negative in 18%). The point for the trend is that this surgery is designed around lid support and function. A change in the outer corner that is made for appearance alone still affects how the lower lid sits, and a lid that sits lower or does not close well can leave the surface of the eye exposed and dry. I describe that problem in the article on dry eye after eyelid surgery.

Brow lifts. A 2018 systematic review of 76 studies of brow lifts found complication rates that differ by technique: revision was highest after hairline brow lifts (7.4%), numbness after direct brow lifts (5.5%), asymmetry after temporal or lateral lifts (1.5%) and hair loss after endoscopic lifts (2.8%). The authors also noted the lack of randomised trials and of standard outcome measures, so the figures should not be read as a ranking of techniques.

What about mewing and other claims online?

Mewing, which means holding the tongue against the roof of the mouth in the belief that it reshapes the jaw and midface, is a separate subject from eyelid surgery. This article cites no study of it and so makes no claim for or against it. What can be said is narrower: nothing about tongue posture, eye exercises, tape or "canthal tilt" apps changes the lateral canthal tendon or the orbit.

Be wary of any claim that a tilt can be "measured" from a single selfie. Angle depends on camera distance, head position, the expression of the face and the landmarks used, and the research above used calibrated 3D imaging. A photograph from one angle is a weak basis for any decision, and a score from an app is not a medical assessment.

What if I think about my eyes all the time?

Wanting your face to look different is common and not a failing. When the worry takes over, with hours spent comparing photographs, checking mirrors or avoiding them, or distress that stays after a change, it is worth speaking to a doctor, and that is a health matter and not a vanity matter.

The NHS describes body dysmorphic disorder as a condition in which a person worries a great deal about a specific area of the body, often the face, and says that having it does not mean someone is vain or self-obsessed. It advises seeing a GP, notes that it can be treated with cognitive behavioural therapy or, for moderate symptoms, an antidepressant of the SSRI type, and says symptoms probably will not go away without treatment. A 2015 systematic review notes that people with the condition often first present, and are diagnosed, in cosmetic surgery settings. I raise this because surgery on an eye does not treat distress about the eye. A good consultation will ask about the worry as well as the lid.

How do I choose a surgeon if I still want to ask about this?

Choose a registered specialist, ask which of the three features you want changed, and ask what they would not do. In Malaysia an ophthalmologist who has trained further in oculoplastic surgery works on lids, brow and the tissues around the eye socket. Their registration can be checked, as I explain in my guide to choosing an eyelid surgeon in Malaysia.

Questions worth asking: which part of the trend look is bone, which is soft tissue and which can be changed; what the plan is if the lid sits lower or does not close well afterwards; and what a lower-risk alternative would be. If a plan does not feel right, it is reasonable to seek a second opinion before eyelid or orbital surgery.

For the wider picture of how the eyes and brows work together, see the periorbital aesthetics section and my hub article on what makes eyes look tired.