For some reason blinking is all the rage these days. Lots of characters blinking, even when in the MC POV. First, if it’s in the MC POV, very rarely do we realize our own blinking, unless we blink back tears or blink away dust and that’s okay. But use in the appropriate circumstance.
Or if it’s the MC observing the blinking on another character, well that’s kind of the same as above. When you are looking at someone, talking to them, how often do you notice their blinking? Very rarely. And what is it supposed to convey? Surprise? Anger? Sadness? Not really. And there are so many other actions that character could do that would impress on the MC better. And therefore the reader. Give us actions and dialogue to convey what the other character is thinking and feeling.
Blinking gives the reader very little to go on. Get them out of there! So my challenge to you is to gut those blinks from your manuscripts.