Your article brought to mind what could be a biblical description of this phenomenon. In Mark 8:22–26, a blind man reports after an initial healing touch by Jesus that he sees people, but they look like “walking trees.” After a second healing touch, the man sees everything “clearly.” While the account doesn’t specify how long the man had been without sight, one can presume that the description refers not only to changes in the eyes but also to image processing in the brain.

Sonia Balcer
Glendale, Calif.