Harry saw is pupils contract to thin slits, saw the skin around his eyes whiten.

哈利看到他的瞳孔缩成了两条窄窄的细缝，看见他眼睛周围的皮肤变白了。

Your pupil contracts when you're imagining the bright thing just like it does if I look up at the light.

想象光亮物体时人的瞳孔会收缩——就像人抬头看光时瞳孔的反应。

If a lot of light is coming in like when using light modes, our pupils contract allowing less light in, creating a wide depth of field.

如果大量的光线进入到我们的眼睛，比如我们在使用光亮模式时，瞳孔就会收缩，只允许少量光线进入，从而创造了广阔的景深。

Your pupil contracts when you're imagining the bright thing just like it does if I look up at the light.

皮尔逊：当你想象明亮的东西时，你的瞳孔会收缩，就像我抬头看光一样。

If a lot of light is coming in like when using light modes, eye pupils contract allowing less light in, creating a wide depth of field.

如果像使用灯光模式时一样有大量光线进入，眼睛瞳孔会收缩，允许较少的光线进入，从而产生宽广的景深。