Materials Needed
Glazed Tile
Water Bowl
Plain Newsprint
Sponge
Brushes: #5 Red Sable, 
#2 & #4 Liner Brushes 
#6 Square Shader
Stains of your choice.

Place the iris in the same position in both eyes

Let's start with the basic eye. We will get a little fancier later on in the lesson.
Pour a little white stain on your tile. Using a damp #5 sable block in the eyes. Add some light blue stain for the iris to your tile. Clean your brush in the water bowl. Use this same brush to paint in the irises. Place them both in the same position making them touch both the top and bottom eyelids.

Using a square shader takes a little practice. Pour a little dark blue stain on your glazed tile. Place a damp sponge beside your water bowl. Wet the #6 square shader in the water and touch it once to the damp sponge to remove the excess water. Slide the corner of the brush through the puddle of dark blue color. Practice making c strokes on your newspaper, (see picture). The stain will be darkest on the outside fading out to nothing as it flows across your brush. Work away from yourself, turning the piece upside down if necessary. Once your feel comfortable with this, then make the stroke go in a complete circle. Now with the color side of your square shader to the outside of the iris, shade the iris of the eye making a complete circle.
Using the #5 Red Sable, paint in the pupil with black stain. Place both pupils in the same area of the eye. Make it nice and large, and touch both top and bottom eyelids. It will probably take two coats of black to cover.
It is best to practice using the liner brush before using it on the eyes. It is well worth the time spent to master this as you cannot achieve the same results with any other brush. You must first learn to load your brush correctly. Pour a little black stain onto your tile. I like to thin it just a little with water. This make is flow a little better. Wet your brush and fully load it with the black. Gently pull your brush away from the paint, twisting it on the tile as you pull it from the paint. This will give a nice point to your liner brush. When properly loaded the bristles will hold the point with enough paint to go quite a ways before reloading. Holding the brush straight up, press the bristles down allowing the bristles to spread out a little, then start lifting the brush and pull at the same time. This will give you the stroke you need for painting eyelashes. Practice on your newsprint until you are happy with the results.
When you paint the lashes on the eye, start at the corner of the eye nearest the nose. Take your first stroke all the way across the top of the eyelid and a little past. Using your #4 liner do just a few of the heavier  lashes, then go back and fill in with the #2 liner with daintier and smaller strokes. It is easier to turn your piece upside down to paint the left eye. This allows your strokes to flow in the same direction. Follow the same steps as in the first eye. 
Using the #2 liner and black stain, outline around the blue iris with a fine line.
With the same stroke as the upper lashes, only in the opposite direction, paint in the lower lashes using the #2 liner brush and black stain.
The final touch is the highlight. Place the highlight in the same spot in both eyes. Be sure to place it in the black of the eye, not the iris. I am using a dot for these eyes. Place a tiny bit of white on your tile, use the tip of the handle of your brush, touch it to the stain and place in the eye.
We will continue with this lesson adding advanced techniques, cutsie eyes, and a few don'ts.