Many here have seen those eyes. Pictures can be quite telling. Even now, in pictures of our family together, my daughter and my eyes are bright and sparkling, his are "lifeless".
"Interpreting Depressed Eyes: The Window to the Soul
Depressed eyes can communicate a lot about an individual's mental health. It's crucial to remember, however, that these signs alone cannot confirm a diagnosis of depression. They can only hint at the possibility, and it's important to consider them alongside other symptoms.
Conveying Emotional Pain
Eyes have long been considered the "windows to the soul," reflecting an individual's innermost emotions.
Depressed eyes may represent the emotional pain that the person is experiencing, showing a glimpse of the inner turmoil that they may not be expressing verbally."
https://www.grouporttherapy.com/blog/depressed-eyesThere is a lot of research about body language and what can be learned about someone. Another picture from our daughter's wedding, the 4 of us, three of us holding one another and smiling with delight...he is standing away from us, one hand over the other in front of his body, expressionless.
These are the physical manifestations that we see in MLC. They are real and can indicate depression.
There is a facebook site of people who have MLC spouses. I have seen others post pictures of their spouse in better times and now, and the thing most people are aware of are the eyes.