Sentence:  Coastie yanked her eye away from the night <WSD>scope</WSD> when those big lights were caught by it and amplified in intensity. Her entire view had gone white in an instant. “I can't see!” Temporarily blinded, she let touch become her primary sense, dropped the M40, and grabbed her alternate weapon, an M16 with an ACOG day <WSD>scope</WSD> that was already registered for the same distance. 
Meaning of the word marked with <WSD> tags:  A device used in aiming a projectile, through which the person aiming looks at the intended target.