Idk man I just drew it
The eyes really convey the expression well.
Haha not really if you look at actual human reactions. Your pupils actually get bigger when panicked or frightened do to the adrenaline rush this also allows more light to the pupil and can help process information a bit quicker. *shrug* I'm an eye nerd tbh.
Yeah but it's the opposite in anime, usually, which is the style of the drawing. Even if it's not realistic doesn't mean it's not good.