眼睛 (yǎn jīng) means eye or eyes. 眼 alone can also mean eye in compounds (眼科, ophthalmology; 眼泪, tears), while 睛 specifically refers to the pupil or eyeball. The measure word for a pair of eyes is 双 (shuāng): 一双眼睛. Common expressions include 眨眼睛 (to blink), 闭眼睛 (to close eyes), and 睁眼睛 (to open eyes). 眼睛大 means having large/open eyes, considered attractive in Chinese culture.