Aesthetic Before-and-After Photos: How Lighting and Position Can Mislead

The short answer: what a photo pair can and cannot prove

A dramatic before-and-after pair feels like hard evidence because we tend to treat a camera as a neutral witness. The clinical-photography literature says otherwise. A single pair shows that one person looked a certain way on two occasions, under two sets of photographic conditions. Unless those conditions were matched, it cannot show how much of the difference came from the treatment, and even a well-matched pair cannot show what a typical patient should expect.

Camera distance, light direction, head angle, expression, skin preparation and the timing of the “after” shot can each change how a face looks with no change in the tissue. Three published findings give a sense of scale:

• Camera distance alone can make a nose look about 30% wider. In a mathematical model published in JAMA Facial Plastic Surgery (a projection calculation from average facial measurements, not a study of photographed patients), a photo taken at a selfie distance of about 30 cm (12 in) made the nose look about 30% wider in men and 29% wider in women, relative to cheekbone width, than an undistorted projection. At 1.5 m (5 ft) there was essentially no difference. The distortion comes from how close the camera is, not from the lens. A close-range phone snapshot paired with a portrait-distance follow-up can make a nose look narrower when nothing about it changed.

• Lighting geometry can show or hide wrinkles on the same skin. In a 1991 Archives of Dermatology technique study in which 30 patients were examined and photographed, parallel-polarized lighting produced images with enhanced surface detail, while cross-polarized lighting made “wrinkles and surface detail disappear” and gave an enhanced view of vessels and pigmented lesions. The skin was the same; only the light changed.

• About one in five placebo patients met an improvement endpoint in a pivotal trial. In REFINE-2, a randomized, double-blind phase III trial of injectable deoxycholic acid (ATX-101) for submental fat, 22.2% of placebo-treated patients met the composite one-grade-or-better improvement endpoint 12 weeks after their last treatment, versus 66.5% of treated patients (two-grade improvement: 3.0% versus 18.6%). The composite required improvement on both a clinician-rated and a patient-rated scale, so it is not a pure photo-grading result. It still shows that apparent improvement occurs without the active drug, and an uncontrolled photo pair has no way to separate the two.

None of this means galleries are faked. Many practices photograph carefully, and the standards papers cited here describe before-and-after photos as legitimate tools for medical records, patient education and marketing. A phone photo taken at the same distance and in the same light as the original can be an honest comparison. The question for a reader is narrower: were the two photos taken under conditions that make the comparison fair, and is the pair representative?

Camera distance: why the same face looks different at arm's length

Perspective distortion is simple geometry. When a camera is close to a face, the features nearest the lens, such as the nose and lips, take up a disproportionately large share of the frame, while features farther back, such as the ears and sides of the face, shrink or drop out of view. Move the camera back and relative sizes approach what you see across a room.

Ward, Ward, Fried and Paskhover (2018), writing in JAMA Facial Plastic Surgery, modeled the face as a set of planes and used average measurements from a racially and ethnically diverse US anthropometric survey to calculate how nasal proportions change with camera distance. Holding cheekbone (bizygomatic) width fixed, a photo taken at 12 in (30.48 cm) increased perceived nasal breadth by 30% in men and 29% in women compared with an orthographic (undistorted) projection. A photo taken at 5 ft (1.5 m), a standard portrait distance, produced essentially no difference. Holding nasal breadth fixed, the distance across the nasal tip (intercrural distance) was 7% greater at 12 in. The authors note that their model does not address vertical or horizontal camera angles and call for further study.

The letter opens by citing an American Academy of Facial Plastic and Reconstructive Surgery poll in which 42% of surgeons reported patients seeking cosmetic procedures to look better in selfies and social-media pictures. The practical point for this article: a close-range phone photo makes a nose look wider than it does at portrait distance, and that same distortion can slip into a before-and-after pair.

In the Australasian Journal of Plastic Surgery, Callan and Wilson (2021) name four factors that must be replicated between sessions to avoid photographic bias: depth of field, exposure, perspective and point of view. In their system, perspective distortion becomes noticeable at about 1 m (3 ft). They recommend a fixed camera-to-subject distance between 1.2 and 3 m (4 and 10 ft), preferably 1.5 m, where magnification distortion is under 3.5%. Their rule is blunt: photographs cannot be matched unless they are taken from the same distance, so pick a distance, mark it and use it every time.

Distance, not the lens, drives the distortion. Callan and Wilson correct a common misconception: perspective is set by camera-to-subject distance. Photos taken from the same distance with a 24 mm or a 135 mm lens look identical once cropped to the same framing, and in their comparison a smartphone and a DSLR shooting from 1.2 m produced the same perspective (exposure, resolution and depth of field still differed). Phones distort faces mainly because their wide lenses tempt people to stand close to fill the frame. The authors add that accurate before-and-after comparisons still require standardized conditions, and their system relies on a camera with locked manual settings.

Prantl, Brandl and Ceballos (2017), in Plastic and Reconstructive Surgery – Global Open, call the distance between photographer and patient “the most manipulated parameter” of before-and-after documentation, and show how changing only the distance distorts the two-dimensional image. Their fix is the same: mark the distance, keep it fixed and adjust framing with zoom or cropping. They also flag camera height, since shooting from above or below changes perspective; the camera should sit level with the area being photographed.

Picture a hypothetical pair: a “before” taken with a handheld phone at about 40 cm and an “after” taken from 1.5 m on a tripod. Based on the geometry above, the nose and central face would look larger in the “before” even if no tissue had changed. Two photos taken at clearly different distances cannot be compared fairly.

Lighting can add or erase texture on the same skin

Distance governs proportions; light governs which textures, contours and colours are visible. Light reflected from skin has two components: surface glare, which carries texture cues, and light scattered back from inside the skin, which carries cues about pigment, redness and blood vessels. Anderson's 1991 study in the Archives of Dermatology separated the two with polarizing filters on the light and the camera.

With the filters parallel, images showed enhanced surface detail. With the filters crossed at 90 degrees, “wrinkles and surface detail disappear”, and vessels and pigmented lesions stood out more. Dermatologists use this on purpose; cross-polarization is the principle behind polarized dermoscopy. For a reader comparing photos, the consequence is simple: a “before” in ordinary light and an “after” in cross-polarized light could show smoother-looking skin with no change in the skin. This was a 30-patient, film-era technique study. It shows what lighting can do, not how often clinics do it.

Ordinary light direction and exposure have similar effects, whether a mismatch is deliberate or just inconsistent technique:

• Angled light versus flat light. Prantl and colleagues note that showing surface changes such as cellulite or pore size requires deliberately angled backlighting (about 135 degrees) instead of their standard setup. The corollary for readers: light that skims the skin casts a shadow in every dip, while flat, frontal light fills those shadows in. A textured “before” under angled light and a smooth “after” under flat light may reflect the lighting more than the skin.

• Distance to the light and the background. Illumination falls off with the square of the distance from the source, so Callan and Wilson require that the distances between light, patient and background never change. When they do, the exposure of the face and the background drifts and the two photos no longer match. A brighter exposure tends to wash out fine lines and light pigment; a darker one deepens shadows under the eyes and cheekbones.

• Two direct lights. Callan and Wilson write that the historical use of dual direct light sources in clinical photography creates unnatural shadows and removes others, “altering the perception of depth in the face.” Cheek contour and under-eye hollows are where a reader would notice that change.

• Background and colour cast. Prantl and colleagues show that the same colour looks different against different backgrounds, so background brightness and colour should stay constant; they recommend grey or dark blue. A warmer or cooler colour balance in one photo can change apparent redness and skin tone.

Published standards therefore control light tightly, though they differ on equipment. Prantl's proposal excludes daylight because it changes constantly, rates a camera's built-in flash as suboptimal in light quality and direction, and recommends two diffused lights at 45 degrees on either side of the camera at a daylight colour temperature of 5,500 K. Callan and Wilson instead use a single strobe bounced off the ceiling and walls, fixed manual camera settings and a white balance near 5,200 K. Both aim for the same thing: identical, controlled light at every session.

Chin, head tilt, expression, makeup and even breathing

Even with distance and light locked, the patient's position and expression can change a photo. Callan and Wilson state that photographs can never be compared unless the head is in the same position on all three axes, and that these differences cannot be corrected by cropping:

• Tilt (chin up or down). With the eyes on the camera, tilting the head back shows more of the upper-eyelid platform; tilting it down shows more white below the iris (scleral show). Tilt also changes the angle of the neck and how much of the nostrils is visible. Those are the same areas that eyelid, nose and neck treatments aim to change, so a chin-up “after” can imitate a result.

• Roll (head canted to one side). A canted head shifts the relative heights of the brows, eyes and jawline on each side, which can exaggerate or hide asymmetry.

• Pan (head turned). Turning the face slightly changes how much of each cheek and jawline faces the camera, so contour comparisons stop being like for like.

Callan and Wilson recommend keeping the ears fully exposed so head tilt can be checked, and aligning the same camera gridline each session. Prantl and colleagues go further. In their view, the traditional Frankfurt reference line tips the face too far upward to document submental fat (a double chin) realistically, so they propose an alternative reference line used by the NETWORK-Lipolysis group. Which reference a clinic uses can decide whether a double chin even shows in the “before.”

Expression matters as much as angle. Callan and Wilson write that “the slightest smile, frown or tension will change the positions of facial volume, lip position, brow position and resting eyelid level.” Prantl's standard is a neutral expression in both photos; a neutral “before” followed by a smiling “after,” or the reverse, is not recommended. A slight smile lifts the cheeks, which can look like restored midface volume.

Preparation is the next variable. Prantl's standards require all makeup and jewelry to be removed for every session, including the post-treatment photos: “pretreatment photographs without makeup and posttreatment photographs including makeup should be avoided.” Hair should be held back the same way so the whole face is visible, and glasses photographed both on and off. The authors also note that complexion can change between sessions, for example after a beach holiday. Callan and Wilson add that skin reflectivity varies from day to day and that skin preparation must be equivalent when skin changes are being assessed. Concealer, tinted sunscreen or a tan in the “after” can hide redness, uneven tone and dark circles.

For body treatments, Prantl and colleagues warn that photos documenting abdominal fat reduction “can be affected by the patient's breathing alone”. Their standard is an upright posture with the patient exhaling before the photo is taken, and the same undergarments in every session. Standing taller, drawing in the abdomen or holding a breath can change an abdominal photo with no fat loss at all.

Darker skin tones: why camera and light matter even more

Photographic pitfalls weigh more heavily on darker skin (Fitzpatrick types IV to VI). The clearest published guidance in this evidence set is a short perspectives letter in the British Journal of Dermatology by Oh, Markova, Noor and Rotemberg (2022). It comes from dermatology practice at a cancer center, where the photos showed rashes, not aesthetic results. Within that scope, it makes several points that apply to any before-and-after comparison:

• Redness is harder to capture. Reliable photos of red (erythematous) skin conditions are challenging even with good equipment and standardized methods, especially for Fitzpatrick IV–VI. Higher melanin density adds competing background colour that interferes with depicting overlying redness. In the authors' examples, redness was less visible in darker skin under conventional white light than in lighter skin.

• Calibration history. The authors trace part of the problem to early colour photography, when Kodak's “Shirley card,” an image of a white woman, was the standard calibration tool. Newer colour-balancing technology has addressed many issues, but capturing detail and redness in darker skin remains a challenge.

• Glare. Ordinary white-light photos carry surface glare. Cross-polarized photos remove it, enhance redness and increase the contrast of a lesion against surrounding skin, which the authors note helps distinguish an active lesion from healed postinflammatory hyperpigmentation.

• The trade-off. Cross-polarized photos make it harder to tell whether a lesion is flat or raised and can add shadow in some areas, while white light shows surface texture better. The authors recommend using both white and cross-polarized light when available.

Two practical conclusions follow. First, the lighting mismatches described above can matter even more in photos of darker skin, where redness and texture are already harder to capture; a switch between white and cross-polarized light in a pair changes both. Second, check whether the gallery shows results on skin like yours at all. A gallery with nobody of your skin tone tells you little about your likely result or your pigment risk. Our guide to checking whether a study or photo set applies to your skin tone covers what to ask when that evidence is missing.

What advertising rules say about before-and-after images

Advertising regulators treat before-and-after images as claims about what a treatment does, not as decoration. The rules differ by country, and neither framework below bans clinic photos. Together they describe the standard a fair gallery should meet.

United Kingdom: ASA/CAP guidance

In the UK, the Advertising Standards Authority (ASA) enforces the CAP Code for non-broadcast advertising, a self-regulatory system that does not apply to US practices. CAP's AdviceOnline guidance on before-and-after photos (updated 5 June 2025) is advice from the CAP Executive, not legal advice and not binding on the ASA. It says:

• Photos are treated like testimonials. Marketers should hold signed and dated proof that the photos are genuine and have not been manipulated. The guidance cites rulings involving The Dental Suite (13 December 2017) and EF Medispa (20 February 2013) on this point.

• Photos must not exaggerate efficacy. Marketers need relevant evidence to substantiate the impression the images create.

• Production techniques can mislead. CAP's guidance on cosmetic advertising flags pairs where only the “after” image used pre-production techniques, and retouching of anything directly relevant to a product's apparent performance, such as reducing lines and wrinkles around the eyes in an eye-cream ad.

• Disclaimers do not fix a misleading image. An inherently misleading ad remains misleading regardless of any superimposed disclaimer, and photos do not need “before” and “after” labels to count as implied efficacy claims.

• Prescription-only medicines are a separate problem. Prescription-only medicines cannot be advertised to the UK public, so before-and-after imagery of a product such as Botox, even with no accompanying claims, is very likely to be seen as an implied ad for it.

The guidance also describes a 2018 ruling about ads for laser acne and rosacea treatment (The Laser Treatment Clinic Ltd, 22 August 2018). The advertiser confirmed that the before-and-after images were not of its own customers but were “indicative” of achievable results. It had no proof the images were genuine and no evidence they represented the effect consumers could likely expect, and the ASA upheld the complaint.

United States: the FTC net-impression standard

In the US, the Federal Trade Commission's Health Products Compliance Guidance (December 2022, replacing a 1998 advertising guide for dietary supplements) covers health-related advertising generally. It is not specific to aesthetic clinics, and its examples involve products such as ointments and supplements, but the principles carry over. State medical-board advertising rules vary and are not covered here.

• Net impression. The FTC judges an ad as a whole, including its text, product name and “any charts, graphs, and other images,” rather than isolated phrases. Claims conveyed by images need substantiation just as written claims do.

• Images carry implied claims (Example 6). The guidance describes an ad for a joint ointment whose “before” picture shows an elderly woman using a walker and whose “after” picture shows her dancing. Together with the ad's references to joint health and mobility, the images likely convey a claim that the product can dramatically improve arthritis symptoms.

• “Results not typical” does not cure it (Example 41). Testimonials reporting results more dramatic than users can generally expect are likely deceptive, and disclaimers like “Results not typical” do not cure the deception. In Example 41, a supplement ad shows before-and-after photos of a woman who lost 16 pounds in eight weeks, with a fine-print disclaimer. A trial showed an average loss of only four pounds over placebo, so the FTC calls the disclaimer inadequate and points instead to a prominent statement of typical results placed right next to the claim.

Why even an honest gallery can overstate the result

Even when every photo is matched and unedited, a gallery can still give an inflated sense of the typical result, for reasons that have nothing to do with camera tricks.

Selection. A gallery is a set of cases a practice chose to show, and patients with modest or no visible change are unlikely to be the ones chosen. That is why UK guidance asks whether images represent the results consumers can likely expect, and why the FTC wants typical results disclosed next to atypical ones. One impressive pair says little about how often that result happens.

Timing. Short-term swelling after many procedures can temporarily change how skin and contours look. Without the interval between treatment and the “after” photo, and the number of sessions, you cannot tell whether you are seeing a settled result. Trials fix the assessment time for this reason: REFINE-2 measured its primary endpoints 12 weeks after the last treatment.

Change without treatment. REFINE-2 (Humphrey et al., Journal of the American Academy of Dermatology, 2016) randomized adults dissatisfied with moderate or severe submental fat to ATX-101 or placebo, with 258 treated patients in each group. Its co-primary endpoints required improvement on both the validated Clinician-Reported and Patient-Reported Submental Fat Rating Scales, and it also used MRI to assess submental volume. In the placebo group, 22.2% met the one-grade composite endpoint and 3.0% met the two-grade endpoint, compared with 66.5% and 18.6% on ATX-101. The abstract does not explain the placebo response, and the figure belongs to one injectable, one endpoint and one timepoint; it is not a general background rate for other treatments. The broader lesson holds: some apparent improvement occurs without the active drug, and only a control group shows how much.

What editing is allowed. Not every edit is deceptive. Prantl and colleagues recommend aligning brightness, colour and contrast between sessions, and matching the crop, because these adjustments make the comparison more objective. The exception: if a change in complexion, for example after a peel, is the point of the photo, skin colour should not be adjusted. Filters (other than sharpening a hazy image), retouching and morphing tools are “to be strictly avoided.” Skin smoothing, blemish removal and reshaping all fall on the forbidden side of that line.

Standardization remains current practice. A 2024 review in Aesthetic Surgery Journal Open Forum (Thornton et al.) notes a lapse in standards linked to smartphones and social media. It sets out practical guidelines for standardized, high-quality clinical photography in plastic surgery, together with secure, HIPAA-compliant storage of the images.

A 60-second audit: reading any before-and-after pair

You do not need forensic software. Put the two photos side by side, enlarge them if you can, and work through these checks. Any single mismatch means part of the visible change may be photographic rather than clinical.

Questions worth asking before you book

Asking about photos at a consultation is reasonable and needs no technical knowledge. These questions focus on the evidence behind a gallery, not on whether a treatment suits you, which is a clinical conversation:

1. “When was this ‘after’ photo taken, and after how many sessions?” A clear answer, such as 12 weeks after the final session, helps you judge whether you are looking at a settled result. If nobody knows, treat the pair with caution.

2. “Is this a typical result, or one of your best?” UK guidance expects images to represent results consumers can likely expect, and the FTC expects typical results to be disclosed next to atypical ones. Ask what a typical patient sees and how often a result like this occurs.

3. “Are these your own patients, treated here?” In the 2018 UK ruling described above, the advertiser's images were not of its own customers. It is fair to ask whose result is shown and who performed the treatment.

4. “Can I see matched photos of patients with my skin tone?” Check that lighting and exposure are the same in both photos. Our guide to study populations and skin-tone fit lists follow-up questions.

5. “How do you take clinical photos?” Ask whether the practice uses a fixed camera distance, the same room and lighting, the same camera settings and a neutral expression for baseline and follow-up photos. A consistent setup is also what lets a clinic document your own progress fairly.

6. “What will be documented in my treatment record?” Baseline photos, device settings and product lot numbers belong in a useful record. See our guide on requesting treatment records, device settings and lot numbers.

7. “What happens if I see little change, or turn out not to be a suitable candidate?” A gallery cannot show how often people see little change, so settle expectations before you pay. Read our guides on treatment-package refunds and medical unsuitability and why aesthetic device treatments cost what they do before buying a multi-session bundle.

What photos can never tell you — and where to go next

Even a perfectly standardized, unretouched pair leaves out most of what matters for your decision:

• Durability. A photo captures one moment. It cannot show whether a result lasted weeks, months or years, or how it changed as the face aged.

• Side effects and recovery. A photo of a final result does not show the recovery, discomfort or complications it took to get there.

• Suitability. A result in one person may not carry over to someone of a different age, skin type, skin quality or anatomy, even with the same device and settings.

• Provider and safety. A good photo does not show whether the person treating you is qualified, or whether the practice can recognize and manage complications.

If a clinic photographs you, those images belong first to your medical record. Whether and how a practice may use them in marketing is a consent and privacy question; our guide to before-and-after photo consent and HIPAA explains how compliant practices handle it.

Before-and-after photos are useful when they are matched, unedited and representative. Use the checks above to judge the comparison, ask how typical the result is, and treat a single dramatic pair as one data point rather than proof.

Sources

• Ward B, Ward M, Fried O, Paskhover B. Nasal distortion in short-distance photographs: the selfie effect. JAMA Facial Plast Surg. 2018;20(4):333-335. doi:10.1001/jamafacial.2018.0009. PubMed record

• Callan PP, Wilson W. A standardised system of photography to assess cosmetic facial surgery. Australasian Journal of Plastic Surgery. 2021;4(2):8-21. doi:10.34239/ajops.v4n2.334. Full text (AJOPS)

• Prantl L, Brandl D, Ceballos P. A proposal for updated standards of photographic documentation in aesthetic medicine. Plast Reconstr Surg Glob Open. 2017;5(8):e1389. doi:10.1097/GOX.0000000000001389. Full text (PubMed Central)

• Anderson RR. Polarized light examination and photography of the skin. Arch Dermatol. 1991;127(7):1000-1005. doi:10.1001/archderm.1991.01680060074007. PubMed record

• Oh Y, Markova A, Noor SJ, Rotemberg V. Standardized clinical photography considerations in patients across skin tones. Br J Dermatol. 2022;186(2):352-354. doi:10.1111/bjd.20766. Journal page (Oxford Academic)

• Humphrey S, Sykes J, Kantor J, et al. ATX-101 for reduction of submental fat: a phase III randomized controlled trial. J Am Acad Dermatol. 2016;75(4):788-797.e7. doi:10.1016/j.jaad.2016.04.028. PubMed record

• Thornton SM, Attaluri PK, Wirth PJ, et al. Picture perfect: standardizing and safekeeping clinical photography in plastic surgery. Aesthet Surg J Open Forum. 2024;6:ojae012. doi:10.1093/asjof/ojae012. PubMed record

• Advertising Standards Authority / Committee of Advertising Practice (UK). Before and after photos. AdviceOnline, updated 5 June 2025. ASA/CAP AdviceOnline

• Federal Trade Commission (US). Health Products Compliance Guidance. December 2022. FTC business guidance