Most dictionaries that I have checked give a definition for the adjectives given in the title when they describe eyes, however it is always something like "When eyes X, they shine in a way that expresses a particular emotion". Therefore, I am wondering if these adjectives have different connotations when they describe eyes, as perceived by a native or some who's studied English.
1 Answer
A glint or a gleam in somebody's eye means that somebody has a secret- maybe something that amuses you.
A glimmer is a very dim light, so when it is used about somebody's eye, it maybe means that they barely understand something, or feel only a very slight emotion.
A glitter or sparkle in somebody's eye suggests that they express a strong feeling.