"eye gunk" is an antibacterial ointment, supposedly to protect against any STD's in the birth canal. if you have no STD's, you pretty much don't need it.
Vitamin K is a shot they administer to help the blood clot "just in case" of hemorrage. I don't know the stats exactly, but they are very very low.
some mothers choose to supplement themselves with greens esp. alfalfa (which you can also get in capsule form) leading up to and for a time after the birth, some think that if a baby's not born with it, then it's not necessary, and some choose to agree to the shot only if the birth has been traumatic and interventionist.
PKU should be done at about 3 days old, and screens for a whole bunch of potentially very dangerous things, all of which are also very rare.
it is performed by cutting the side of the baby's heel, and dripping the blood within 4 circles on a piece of card, enough for it to soak right through.
in my daughters experience, this took at least 10 long agonising minutes, and was very traumatic for her (and for me...but that's void, the midwife said most parents actually leave the room because it's too painful to hear their little babies cry so extremely, but i could never leave her alone like that).
PKU is the only one that i did have done, i discussed and agonised over the decision with my partner for days, and we agreed to get it for piece of mind. i half wish i didn't, but i am glad to know she has none of the things it screens for.
However, i really had no idea that the test took so long, or that they needed so much blood. i wish i had've been more prepared for the proceedure and known exactly what it would entail. Even for all the questions i asked and research i did, i was still surprised. perhaps reading someones personal account of the proceedure would have been best, but i never came accross one.
I don't have any links on hand, but all these things have been covered very extensively on here. If no-one has posted any that they have by tomorrow i will try to find some if baby gives me the time
you may also want to check the 'midwifes and doulas' board, they are awesome and know just about EVERYTHING!!
is this site slow for you all the time? maybe try at a less busy time when there's not so many people logged on?