A form of melasma or abnormal brown pigmentation that specifically affects the eyelids, creating dark patches or discoloration.
From Greek 'blepharon' (eyelid) + 'melasma' (from 'melas', meaning black). Melasma itself entered medical terminology in the 19th century to describe this specific pattern of hyperpigmentation, most common in darker-skinned individuals.
Melasma is frustrating because it's triggered by sun exposure and hormones, yet it's hardest to treat on the face where we see it most, and blepharomelasma — when it darkens your eyelids — is especially noticeable because the thin skin there shows pigmentation changes dramatically.
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