Sentence:  She noticed the white stubble already on the doctor's red cheeks, even though it was only afternoon, the vein standing out on his forehead, the intensity of his <WSD>birdeyes</WSD>, like the hawks that soared over the chicken-coop farm of her childhood. 
Meaning of the word marked with <WSD> tags:  An eye that is birdlike, especially one with an unblinking stare or with very keen eyesight.