They say that the eyes are the portal of the soul and it seemed to me just to illustrate it in this tutorial. I saw a lot of tutorial this month on how to draw the eyes well so I would not dwell on it because the others did it wonderfully. Consider this tips as a logical continuation and a contribution of depth. Since we are going to talk about the eyes, it is important to remember that the eyes are not just the pupil and the iris or even the white of the eye but also what surrounds it: the eyelids and eyebrows. We will see together how they work and illustrate all this using Clip Studio Paint. I hope you are ready!
I - Idea and preparation
The problem that often arises is how to transpose an emotion on the eyes. The first advice I have to give you for the general expression of the face is to draw very simple figures, like smileys, to have a visual basis of what the emotion in question sends back. We are going to work on the three most basic expressions:
Then you can combine these different expressions if you want to create new ones and get a new panel of expressions! Example:
You can do without the combination and this schematic work but it can also help you if you are not sure of yourself and want to have an overview.
For some of you, as was the case with me, the problem was not to visualize the expressions but to put them in place on the eye and to position the eyebrows. For this problem I have found a solution which can certainly help you too and which I advise you to do if you have shaky arrangements: the mask technique!
The mask  is the basic mask when you are not moving your eyebrows. To the right  and to the left  of it are expressions of misunderstanding and anger, respectively. In drawing , I have put a side with an eyebrow and a side without so that you can see how to position it on the mask. I made the examples from the front so that the explanation is clearer but you can just as well use it on a profile or 3/4, or other intermediaries, you just need to adapt the mask to the perspective of the face and use the codes of use according to what is visible or not on the face at eye level.
You can see that I put arrows above the eyebrows, they represent the direction of twist on the top of the mask. Note also that the eyelids appear or disappear depending on the distance between the eye and the eyebrow. When you open your eyes, they take up all the space and no longer let the eyelid appear. As when you raise your eyebrows, your skin tightens and your eye opens even more, hiding the eyelid: figure . On the contrary, when you squint as when you are sad or angry , your eyelids appear more since your eye closes.
I couldn't find anything easier to get my expressions right! To find out how to position this mask correctly, take this example again or touch your eyes, you will see that the hole which contains the eyes does not have a completely round shape and that it has certain angles at the end of the tail of the eyebrow, joining the corner of the eye if you draw a line, and a little bit before it.
II - Application!
Now I'm going to show you how I do to paint the emotions on the eyes. For this I will combine sadness and surprise, which can also illustrate extreme fear!
To start, the preparation!
Now we can get down to business! I start by making the line of the drawing to come using my mask, which I adjusted to a slight perspective at the last moment, to be able to start coloring. I make this first sketch with the feather G.
Then, I make a copy of my line layer and make it 36% transparent so that I can paint calmly over the other without losing my guidelines. Then, I put the solid values and a shadow on the eye area since it is a little sunken in the face. I will work in values until the end of the process so that you can understand better and because it is easier for me to work in values then to put everything in color at the end
Then I will start to mark certain shadows like the crease of the eyelid with a darker color and the [lighter pencil], then blur my lines with [blur by fibers]. It is not very clean but it is not the goal at the time of colorization. I'll take care of the rest of the face later.
Now I put points of light on the eyelid and intensify the shadows.
It's time to attack the inside of my eyes and tears. I lightly shade the white of the eyes then leave a point of light to show that his eyes are glassy. I take this opportunity to arrange the eyelashes. I then pass to tears, which I make lighter and that the shade as we would do with water. I use the brushes [lighter pencil] and [darker pencil] to be able to manage the intensity of my line then blur everything with [blur by fibers]. For the eyelashes, I use [fingertips] then I iron with the dark pencil.
I finish the rest of the bust and the face then I put a red gradient on the values layer to give an effect that will strengthen and bring the eye. You can use these kinds of ploys to give a boost and an indicator, even if it is better to have a well defined expression to keep it understandable.
This is how I use this method to create good expressions, I hope it has served you well. I am not particularly gifted myself but I am sure that you will do much better! Even if it is far from being clean because I don't have time to do more but I still wanted to share my knowledge with you, I hope it remains clear enough for you.
Now tell me! Do you feel something in front of this illustration? Do you see that she is afraid? If so, I can consider myself to have succeeded in the mission I had given myself. Hoping that this tips will have helped you and that you will make wonderful illustrations with it!
With that, have fun!