iris opening造句

Sometimes the peripheral iris opening can heal, which means that the hole ceases to exist.
Straight blades result in polygon shape of the diaphragm opening, while curved blades improve the roundness of the iris opening.
The shape of the iris opening has a direct relation with the appearance of the blurred out-of-focus areas in an image called " bokeh ".
In reality, when a shot of Earth's iris opening and closing is needed, the actual animation of it is added in post-production, as the mechanics of it opening and closing would be very difficult to build.
No mention was made of the focusable lens, the expanding / contracting iris opening in response to light intensity, the muscles that move the eye ball in its socket, the development of an optic nerve to the brain, or the ability of the brain to comprehend the nerve impulses received.
It's difficult to find iris opening in a sentence. 用iris opening造句挺难的