be sharp-eyed
aperture; eye; key point; look; small hole
【医】 eye; oculi; oculo-; oculus; ophthalm-; ophthalmo-; ophthalmos
ophthalmus
needle; piercing; point; sharp; the best of its kind; tip; top
【医】 apex; apices; apico-; cusp; cuspis; mucro; point; puncta; punctum; tip