Beyond the centre

Central vision handles fine detail. Side vision is the surrounding view. Compare the same scene with a central patch and with the outer field restricted.

What do you miss when a different part of the view is hidden?

Try the idea

Finding a face and noticing the edge of a step make different demands on sight. One uses the centre of your view. The other uses the edges.

Try a central patch and an outer mask on the same living room. What happens to the clock, the door and the coffee table?

Turn on JavaScript to use the interactive experiment. The written introduction and the original source stay available here.

Moorfields: glaucoma