In some old masks, largely for industrial use out of water, small eye-windows above a rounded opaque nose-and-mouth mask like some gasmasks.

He could see fiery eyes glaring at him from the slitted holes in that opaque blue mask.

Her face is a magical mask, sometimes utterly opaque, sometimes transparent.

Bullen looked up as we came through the door; his face was grim and still, a thinly opaque mask for the consuming worry that lay beneath.

The darkness was as complete as if an opaque mask had been dropped over his head.

The opaque night-vision mask he wore made him look like some giant insect.

With a frame-transfer CCD, half of the silicon area is covered by an opaque mask (typically aluminum).

The Hartmann mask is a simple opaque mask containing two or three holes.

Amateur astronomers attempting to view the ashen light can try this by using an occulting bar, an opaque mask for one's eyes.

It was as if Asquiol looked out at Mordan through a series of tinted, opaque masks covering his body and interleaving on either side.