"When not seen as sternness/anger, with which it is easily confused,
This is the expression frequently worn by artists in their self-portraits
."
(re photo above)FACIAL EXPRESSION: INTENSITY/ATTENTION
the combination of lowered brows and widened eyes gives the face
the appearance of intense concentration and interest.
Gary Faigin, The Artist's Complete Guide to Facial Expression
"The serial number of a human specimen is the human face ,
that accidental and unrepeatable combination of features.
It reflects neither character nor soul, nor what we call the self.
The face is only the serial number of a specimen."
Milan Kundera, Immortality