We're lucky in that DS5.5 has an eye issue where one eye was being ignored by his brain. I forget the actual condition, but it makes him look crosseyed if he's not wearing his glasses. It didn't seem to affect his learning much, but since he only was using one eye his depth perception was off so he's lagging some in coordination. Something like 50% of children outgrow glasses with this condition so we're fortunate.

JB