His careful movements caught my attention out of the corner of my eye, as I e-mailed and meal-planned and sorted the mail and remembered wet laundry in the washer and half-checked the clock to see when we needed to leave.

Slowly he lifted the oversized magnifying glass to his eyes, peering down at the book on the table in front of him. Gently he brought the glass down towards the page. Then raised it back up again. He turned slightly from where he stood, saw a pencil next to the book, peered down again. Brought the lens up toward his face, then lowered it to watch the perspective change.

For 15 minutes he did this—silently, carefully. Moving gradually from table to chair to couch, inspecting anything and everything that might be of interest: the texture of fabric, the color of pictures, the edges of corners.