before one's eyes; in front of one
Formal or literary term for something happening directly in front of one's eyes. Often used in dramatic or written descriptions.
I gasped at the magnificent view spreading before my eyes.
The accident happened right before my eyes.
眼前 is a formal, literary word for 'right before one's eyes,' whereas 鼻先 is more colloquial and emphasizes closeness to the face.
Compound of 眼 (gan, 'eye') and 前 (zen, 'front'). The reading is on'yomi, and the word is a Sino-Japanese compound.