Abnormal discoloration or dark pigmentation of the eyelid skin, often appearing as patchy or uneven coloring.
From Greek 'blepharon' (eyelid) + 'dys-' (abnormal or difficult) + 'chroia' (color or complexion). The prefix 'dys-' indicates abnormality, and this term emerged in dermatology and ophthalmology to describe color irregularities.
The skin around your eyes is the thinnest on your body and shows aging and pigmentation changes faster than anywhere else, which is why dark circles, melasma, and other color changes often appear on eyelids first — they're like a window showing what's happening with your skin health overall.
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