Crow's feet
back to main page
Crow's feet are radially arranged wrinkles in the lateral eye area, medically referred to as lateral canthal lines. Initially, they appear during smiling, squinting, and other facial movements, which is why they are classified as dynamic wrinkles. Over time, due to repeated contractions of the orbicularis oculi muscle, photoaging, and changes occurring in the skin's extracellular matrix, they can also become permanent at rest. Their visibility is influenced by, among other factors, skin thickness, exposure to solar radiation, tobacco smoking, genetic predisposition, and individual facial anatomy. Prevention and treatment include photoprotection, proper skincare, modification of environmental factors, and individually tailored aesthetic medicine procedures.
Crow's feet - what are they
Crow's feet develop primarily as a result of contractions of the lateral part of the orbicularis oculi muscle. This muscle is responsible for closing the eyelids and participates in natural facial expression. During smiling, its fibers pull the skin toward the orbit, creating characteristic radiating folds.
The skin around the eyes is thin, with relatively few sebaceous glands and a delicate subcutaneous layer. Its mechanical properties depend mainly on type I and III collagen, elastin fibers, glycosaminoglycans, and proper hydration. With aging, fibroblast activity decreases, the organization of supporting fibers changes, and the skin becomes more susceptible to deformation.
Two interacting mechanisms participate in the development of crow's feet:
- intrinsic aging, associated with age, hormonal changes, cellular metabolism, and genetic predisposition;
- extrinsic aging, the most important element of which is chronic exposure to ultraviolet radiation.
UVA radiation reaches the dermis, increases the production of reactive oxygen species, and activates matrix metalloproteinases, which are collagen-degrading enzymes. UVB acts mainly in the epidermis, causing DNA damage and an inflammatory response. The result of chronic sun exposure is collagen fragmentation, disruption of elastin structure, and a gradual loss of skin elasticity.
In clinical practice, a distinction is made between dynamic crow's feet, visible during facial expressions, and static wrinkles, present also when the face is relaxed. Diagnosis is based on examination of the eye area at rest and during smiling, assessment of skin quality, muscle symmetry, and the position of the eyebrows and eyelids.
Crow's feet - at what age do they appear
The first dynamic lines in the lateral eye area can become visible as early as around 20–25 years of age, especially during an intense smile. At that point, they are a physiological result of the work of facial expression muscles. In many people, more noticeable wrinkles appear after the age of 30, while their persistence at rest usually increases in subsequent decades.
Chronological age is only one of the factors. The rate of crow's feet formation is accelerated by:
- a high cumulative dose of UVA and UVB radiation;
- the use of tanning devices;
- tobacco smoking and exposure to tobacco smoke;
- air pollution and chronic oxidative stress;
- frequent squinting, including due to uncorrected refractive errors;
- strong activity of the orbicularis oculi muscle;
- a fair skin phototype and lower melanin content;
- dryness of the skin and impairment of the epidermal barrier;
- a decline in estrogen levels, particularly during the perimenopausal period;
- individual anatomy of the orbit, eyebrows, and midface tissues.
After menopause, decreased estrogen activity promotes a reduction in collagen content, deterioration of hydration, and a loss of skin elasticity. Wrinkles may then deepen more rapidly. The process remains individual, which is why assessing age alone is of lesser importance than analyzing facial expressions, photodamage, laxity, and tissue quality.
Crow's feet - how to prevent
The best-documented method of reducing photoaging is daily broad-spectrum photoprotection. In a randomized study, regular sunscreen use was associated with significantly lower progression of clinical signs of skin aging.
The basics of prevention include:
- daily use of an SPF 30-50 product with high UVA protection;
- applying an adequate amount of the cosmetic product and reapplying during prolonged exposure;
- UV-filtering sunglasses and headwear;
- correction of vision defects reducing reflexive squinting;
- smoking cessation;
- gentle cleansing and systematic support of the epidermal barrier;
- skincare containing humectants, ceramides, and antioxidant substances;
- regular sleep, balanced nutrition, and physical activity.
In the treatment of photoaging, retinoids represent the best-studied group of topical ingredients. Tretinoin can increase collagen synthesis and improve the structure of photodamaged skin [4]. The eye area requires a product with an appropriate concentration, gradual introduction, and maintaining a safe distance from the eyelid margin. Cosmetic retinoids, such as retinol and retinal, usually act more gently.
Moisturizing cosmetics can temporarily reduce the visibility of fine lines by improving the hydration of the stratum corneum. Peptides, vitamin C, niacinamide, and antioxidants support skincare; however, their effects depend on the chemical form, concentration, product stability, and regularity of use.
Crow's feet - how to reduce
The reduction method is selected according to the dominant mechanism. Dynamic wrinkles respond best to treatment that limits excessive activity of the orbicularis oculi muscle. Static wrinkles, laxity, and photodamage primarily require skin quality improvement and remodeling.
Botulinum toxin type A inhibits the release of acetylcholine at neuromuscular junctions. Controlled reduction of the contractile force of the lateral part of the orbicularis oculi muscle smooths wrinkles when smiling. The effect usually appears within a few days, reaches its full extent after about two weeks, and lasts on average for several months. Knowledge of anatomy, proper placement of injection points, and preservation of individual facial expressions are of crucial importance.
Skin remodeling can be supported by:
- ablative or non-ablative fractional lasers;
- radiofrequency, including microneedle radiofrequency;
- microneedling;
- chemical peels designed for the eye area;
- ultrasound of an appropriately selected depth;
- regenerative and biostimulatory treatments.
Procedures inducing a controlled thermal or mechanical stimulus trigger healing, collagen synthesis, and extracellular matrix reorganization. Hydrating hyaluronic acid preparations can improve skin properties, whereas classic filling of the lateral eye area requires great caution due to thin tissues, mobility of the area, and vascular course.
The treatment plan should take into account the phototype, tendency to hyperpigmentation and scarring, eye diseases, active dermatoses, medications taken, and previous procedures. Combination therapies can simultaneously address facial expressions, skin structure, and its hydration, while maintaining appropriate intervals between treatments.
Treatments for crow's feet
Ambasada Urody offers procedures targeting various components of the problem. Treatment selection is preceded by an assessment of facial expression, skin thickness, laxity, and the degree of wrinkle permanence.
- Botulinum toxin for crow's feet reduces the activity of the orbicularis oculi muscle. Mesobotox for the eye area and botulinum toxin lifting aimed at raising the corners or the brow line are also available.
- Needle mesotherapy includes Mesolift with non-cross-linked hyaluronic acid, rejuvenating and anti-wrinkle mesococktails, tropocollagen, Nanosoft Booster, and Skinbooster. The treatments serve to improve hydration, elasticity, and the quality of thin skin.
- Tissue stimulators, including polynucleotides and collagen-stimulating products, support the gradual remodeling of the extracellular matrix.
- Microneedle radiofrequency, Spa Deep and Pellevé RF radio waves, and the combined Nanosoft Eye Booster with radiofrequency thermally affect the dermis and stimulate collagen remodeling processes.
- Fractional laser therapy, HIFU, microneedle mesotherapy, and medical peels for the eye area are aimed at improving texture and tension, as well as reducing superficial lines.
- Platelet-rich plasma and CGF utilize autologous blood components containing factors involved in repair processes.
- Needle Shaping uses microneedles and high-frequency current for tissue biostimulation.
- PDO threads, including treatments for crow's feet, lower eyelids, and the Multi-Fill variant covering the cheeks and eye area, provide tissue support and initiate a collagen response.
- LPG Endermologie, Anti-aging Replumping, and LPG eye lift provide mechanical skin stimulation.
- LED light can support post-procedure regeneration, and carboxytherapy is used in treatments for the eye area, especially with coexisting microcirculation disorders and dark circles.
The efficacy of individual methods has varying levels of scientific evidence. The strongest data relate to botulinum toxin in the treatment of dynamic wrinkles and resurfacing lasers in the reduction of static changes and photodamage. Regenerative, biostimulating, and mechanical treatments play a supportive role, depending on appropriate qualification and treatment series planning.
