Crow's Feet
Radiating periocular wrinkles extending laterally from the outer corners of the eyes, caused by repeated orbicularis oculi muscle contraction; a common neuromodulator treatment target.
Full Definition
Crow's feet (clinical term: lateral canthal lines) are dynamic rhytides produced by the orbicularis oculi muscle during smiling and squinting. They are one of the most cited treatment indications in cosmetic dermatology patient literature and regulatory labeling for neuromodulator products. Editors should note the correct punctuation: 'crow's feet' requires an apostrophe after 'crow.' The singular is rarely used clinically; always treat as a plural noun. 'Crow's feet' is acceptable in both patient-facing and clinical copy, but formal scientific manuscripts may prefer 'lateral canthal lines.' The two terms should not be used interchangeably without editorial consistency.
Usage
Usage note: Always include the apostrophe: 'crow's feet,' not 'crows feet.' In formal clinical manuscripts, prefer 'lateral canthal lines.'