Eye Colour Reference/Tutorial

Here's another reference, because I didn't really like the previous one with the (failed ) manga eyes, so I did a new one with eyes looking more realistic and of course, me liking the result.
_{Okay, I only drew ONE eye in pencil on a different page and then copied it down twelve times with Ink pen as you see here, but still!}

The colouring is done the exact same way as seen here, but the pupil is done with the 3rd shade of the four you pick.
Most of the colour designs are copied off of that sheet as well, there are about three I didn't include in previous eye chart, but I forgot to put in the shades you're supposed to use in them.
Anyway, I used the same Ink pen and Watercolour pencils as I did previously. You can use just the usual colouring pencils, you still get the same effect.

I hope this sort of helps anyone.