眼晴 (yǎnqíng) is a Chinese term that literally means "clear eyes" and is used to describe a person who has a bright and intelligent look in their eyes. It is not a commonly used term in English, and there is no direct translation for it.

The origin of the term likely comes from the idea that a person with clear and intelligent eyes is likely to have a clear and intelligent mind. This association is common in many cultures, where the eyes are often seen as a window into the soul or a person's inner thoughts and emotions.

In English, you could describe a person with clear and intelligent eyes as "bright-eyed" or "perceptive." For example:

She has a bright-eyed and intelligent look about her.

He has a perceptive gaze that seems to see right through you.

In Chinese, you could say:

她的眼神明亮而聪慧。(Tā de yǎnshén míngliàng ér cōnghuì.)

他的目光犀利，仿佛能看穿你。(Tā de mùguāng xīlì, fǎngfú néng kànchuān nǐ.)