Perceiving Emotions Behind Facemasks

How is it that we can discern somebody's emotions from their face, particularly their eyes?
Face Masks: Why Your Eyes Might Be Saying More Than You Realize
neurosciencene...
Recognizing Emotion From Facial Expressions: Psychological and Neurological Mechanisms
pdfs.semanticsc...
Reading What the Mind Thinks from How the Eye Sees
doi.org/10.117...