upper eyelid
Refers specifically to the upper eyelid, as opposed to 下まぶた (lower eyelid). Common in everyday and medical contexts.
My upper eyelid has swollen.
彼女は上まぶたにアイシャドウを塗った。
She applied eyeshadow to her upper eyelid.
Standard spelling using 上 (upper) and kana for まぶた (eyelid).
Rare kanji spelling using 瞼 (eyelid); mostly seen in medical or literary contexts.
Compound of 上 (うわ, upper) and まぶた (eyelid). The reading うわ is a common prefix for 'upper' in body part terms.