It wasn't to stop him seeing, but to protect his eyes.

You can - and protect your eyes at the same time.

Protect your eyes when you are going to be in bright light.

Be sure to protect your eyes from the sun, as well.

I lifted a hand to protect my eyes as we went out to the parking lot.

"To protect their eyes from the light when they opened the portal."

He raised a hand to protect his eyes from the glaring light.

Protect your eyes with sunglasses when you in bright light.

Until the effects wear off, protect your eyes from the sun or bright light.

If he blinked to protect his eyes, she didn't see it.