I thought my roo was going to die yesterday. He was essentially blind because both eyes were crusted shut, as you see from pics. Since I got no help here, and could find no sound advice elsewhere, I just used my best judgement. I separated him from the flock, washed his eyes with hot water and baby shampoo. I smeared Vaseline all around his eyes as well. Then I dusted the coop and him with DE. This morning he looks great! Both eyes are open and he's crowing away.
There was one hen who had one eye shut. I treated her the same way, but her eye will not open yet, so I'm going to repeat the treatment on her today.
Hopefully this will help someone who runs across a similar situation in the future.