We dredged him up, for killed, until he whined
"O sir, my eyes—I'm blind—I'm blind, I'm blind!"
Coaxing, I held a flame against his lids
And said if he could see the least blurred light
He was not blind; in time he'd get all right.
"I can't," he sobbed.  Eyeballs, huge-bulged like squids
Watch my dreams still; but I forgot him there
In posting next for duty, and sending a scout
To beg a stretcher somewhere, and floundering about
To other posts under the shrieking air.
Those other wretches, how they bled and spewed,
And one who would have drowned himself for good,—
I try not to remember these things now.
Let dread hark back for one word only:  how
Half-listening to that sentry's moans and jumps,
And the wild chattering of his broken teeth,
This is a key line, understated and unadorned, which conveys the poet’s guilt and causes him to ‘watch my dreams’.