I can attest that I'm short sighted and the problem becomes much much worse if I spend a lot of time in front of my computer. Some days when I go out early in

I can attest that I'm short sighted and the problem becomes much much worse if I spend a lot of time in front of my computer. Some days when I go out early in the morning I can see everything perfectly, and other days I can't even read a number plate that is five metres away.