Thelightisletintotheeyethroughthepupil,whichisactuallyanopeningintheiris.

The light is let into the eye through the pupil, which is actually an opening in the iris.

Setinhishomesoundproofwindows.

Set in his home soundproof windows.

Wenowhavetousealaddertoenter.

We now have to use a ladder to enter.

FromLaViedel'Homme.There'salargerversionhere:KainandAbel.
From La Vie de l'Homme. There's a larger version here: Kain and Abel.