We all have them. What is it we don't see?
As Schopenhauer wrote: 'Every man takes the limits of his own field of vision for the limits of the world.'
As coaches, we need to bear in mind what lens we see things through. The lens of a 'technician', or a 'tactician', or do we see more of the 'performer', the mental and the physical. When assessing a player/athlete we select, delete and generalise. We can't take it all in at once so we tend to see what we want to see, what we are conditioned to see, and so often can miss the rest.
Know your blind spots...because it's there that we might miss something vital.
Bring another coach alongside you - ask them, 'what do you see here?'. This is one of the reasons I'm so grateful to be involved in a team environment with a fantastic group of coaches who are all prepared to ask the question.
It's not a sign of a lack of knowledge or expertise. Simply that we recognise our human condition and two sets of eyes are better than one!