@peter_pedant
Thanks but a typo mangled whatever you were trying to say.
This link
http://www.genetics.org/content/156/1/297.full
has a passage which says (for humans)
"The average mutation rate was estimated to be ~2.5 × 10−8 mutations per nucleotide site or 175 mutations per diploid genome per generation. "
Which is a rather sobering ballpark figure. We are none of us perfect. (Not even blondes. Sorry, gents).
"Rates of mutation for both transitions and transversions at CpG dinucleotides are one order of magnitude higher than mutation rates at other sites. Single nucleotide substitutions are 10 times more frequent than length mutations."
Length mutations are the answer to how "extra information" gets into DNA, out of nowhere. A favourite debating point of IDers.
There is not a huge number of generations of humans (200,000 years???) but, having said that, beyond size, how far back into pre-human species do we need to do comparative biology on to find an eye at least one step-change away from our own? (Other than simple factors, like eyeball size and iris colour because structure and function (ability, acuity, colour sensitivity) changes are what we are concentrating on).