The noun 视野 (shìyě) means 'field of vision' or 'horizon.' In a literal sense, it refers to the range of what one can see. It is also commonly used figuratively to mean 'perspective' or 'outlook,' as in broadening one's horizons.
站在山顶上,视野非常开阔。
Zhàn zài shāndǐng shàng, shìyě fēicháng kāikuò.
Standing on the mountaintop, the view is very expansive.
多读书可以开阔你的视野。
Duō dúshū kěyǐ kāikuò nǐ de shìyě.
Reading more can broaden your horizons.
雾太大了,司机的视野受到了严重影响。
Wù tài dà le, sījī de shìyě shòudào le yánzhòng yǐngxiǎng.
The fog was too heavy, and the driver's visibility was seriously affected.