When I first had T, I thought that having an eye test wasn't something that was too important for children. That was, until he turned 6 and the NHS nurse came to his school and said he might have some sight problems in his left eye.
I got him straight to the opticians and found at that he in fact had quite bad sight in his left eye and it made me sad. How had I never realised? Was he struggling all this time? He had to wear patches for a while to try and help his eye muscles get to work and catch up with his other eye.