In 5e you can see through the eyes of your familiar with the find familiar spell.
...as an action, you can see through your familiar’s eyes and hear what it hears until the start of your next turn, gaining the benefits of any special senses that the familiar has. During this time, you are deaf and blind with regard to your own senses.
Our DM ruled that this feature lasts for the specified duration, meaning our Wizard could not send out the familiar 60 feet around a corner and then effectively communicate with the party around the Wizard. He was blind and deaf with regard to his own senses until the start of his next turn. Our Wizard disagreed. I can see this either way, so I was curious if there was a definite answer.
Can you end this feature of the spell prematurely as is done with concentration spells?