Nicholas,
>I wear glasses and couldn't see well enough to be safe. Nearly rode straight into the back of an unlit lorry delivering beer to a pub.
Are you sure it was lack of vision and not pure instincts? <g>
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges