expression, godan verb (-su)
strain one's eyes; look closely; stare at
Used when focusing intently on something, often in dim light or at a distance, to see it clearly.
暗闇に目を凝らして、人影を探した。
I strained my eyes in the darkness, searching for a figure.
彼は虫眼鏡
He peered closely at the tiny letters with a magnifying glass.