I haven't really been following this debate, but I'd like to point out that your eyeball example has a hole in it in that if you have 2 organisms of a species, and one is lacking one of the things essential to its survival (in this case, its eyesight) this organism is more susceptible to not surving. As such, evolution has worked in this sense. In the end, you'd find it more probable the person whose eyesight is good would survive.
"The eyeball; requires rods, cones, lens, photonic sensors of some sort, an aperture system. Lacking any element its totally useless."
Sure, it shows evidence of intelligent design, but it also shows how evolution has worked as well.