lower eyelid
Refers specifically to the lower eyelid, as opposed to 上まぶた (upper eyelid).
When applying eye drops, gently pull down the lower eyelid.
Common mixed kanji-kana spelling.
Rare kanji spelling using 瞼 (eyelid); 下まぶた is preferred.
Compound of 下 (した, 'lower') + まぶた ('eyelid').