Little puppy had fur in her line of sight. She is jumpy, and when I file her nails, she chews on the file. I did not want her to flinch or gnaw when I was trimming the hair around her eyes! So I waited until she fell asleep on my lap, and gently, quietly, gave her a little trim. I was worried about making the white hairs look strange, but it came out OK. When she woke from her nap, she could see!