Whites of the eyes hmmmm well I have this guy in 54mm (not a great pic but he does have wites showing)
http://groups.msn.com/deusmexsminipics/shoebox.msnw?action=ShowPhoto&PhotoID=110
or this guy who does admitedly have the 1000 yard stare going on (also 54mm)
http://groups.msn.com/deusmexsminipics/shoebox.msnw?action=ShowPhoto&PhotoID=79
or this guy in 28mm who reminds me of Telly Savalas (who loves ya baby)
http://groups.msn.com/deusmexsminipics/shoebox.msnw?action=ShowPhoto&PhotoID=127
My method is to try and leave a black outline to the whites of the eye and use a really really really thin brush. The brush I use defies description but here goes, Its an old Games Workshop fine detail brush with most of its bristles missing which has somehow kept a point allbeit a very bent point so I have to paint at a weird angle but it never fails me in the eye painting dept so I havent replaced it.I have heard of others using 10/0 brushes for this job tho.Once the white is ready i paint a black verticle stripe where the pupil should be as I find that colours dont stand out enough to warant me painting them. (Shep Paine does however do the colour thing he paints a blue stripe then a thinner black stripe in the middle of the blue).
When that part is done I tidy up around the eye with the appropriate flesh tone.
However it is a huge pain in my ****** to do all this and I rarely paint eyes on my minis (just when I want to show off I do) most of my minis look like this
http://groups.msn.com/deusmexsminipics/shoebox.msnw?action=ShowPhoto&PhotoID=113
The point is you do what you feel comfortable with. As most of my models are used for gaming purposes I usually paint eyes on models I know will be picked up and scrutinised (ie commanders or extra ordinary conversions) , the run of the mill guys get the eye wash treatment.