What´s the difference
Take a look at the difference between the verbs SEE, LOOK and WATCH.
When an image comes to our eyes; without intent
Eg.: He opened the door and saw me standing there.
To see something with intent and attention; often used with “at”.
Eg.: John looked at the menu before ordering his pasta.
To look intensely at something (often something that is moving).
Eg.: They watched the plane take off.