冴える[saeru] to be clear (of a sight, sound, colour, etc.)
冴え輝く[saekagayaku] to shine clearly
冴え行く[saeyuku] to clear gradually
冴え冴えした[saezaeshita] cheerful (look)
冴え冴えとした[saezaetoshita] cheerful (look)

冴え渡る[saewataru] to get cold
冴返る[saekaeru] to be very clear
頭の冴え[atamanosae] bright intelligence
腕の冴え[udenosae] dexterity

一眼[ichigan] one eye
一眼レフ[ichiganrefu] single-lens reflex camera
一隻眼[issekigan] sharp eye
遠眼[engan] farsightedness
遠眼鏡[toomegane] spectacles for far-sightedness

凹眼[ougan] cavernous eyes
凹眼鏡[ougankyou] concave glasses
開眼[kaigan] enlightenment
眼下[ganka] under one's eyes
眼科[ganka] ophthalmology