The reason behind Renji's closed eyes (Dokurodan scan)

[pez]

1. Renji mummy: Your hair has gotten long, I'll give it a trim.
Renji: Un!

2. Mummy: It may get into your eyes, so close them.
Renji: Ha-i.

3. Renji: Okaasan?

4. Renji: Okaasan, is it not done yet? Should I keep them closed?

(and so they're still closed now.)

Renji with new haircut: Sa. da. ha. ru!

Sadaharu: !? [if anyone can tell me what okamuro means, I'd be grateful]