For advanced fighters ...Get into a nose to nose situation with your sparring partner get contact with both arms and close your eyes ! ..but maintain contact on your wrists onto his arms and feel his intentions and feel his body movments ,keep him from being able to get a free hit on you by chocking off his intention; fight for the opening or when he pushes back on your arm ,giveway to create an opening by revolving your arm around his to gain the centre.
Even blind you know instantly where there is an opening ,you know at anytime where the head target is, you dont have to see them so long as you maintain contact. Try it out, you'll be very surprized how much of your training is now automatic to you.

The further back you are the harder it is to feel your way,but it is possible with practice.

This gives you a way of practicing 'contact reflexes' ;refexes that are much faster than you can possibly think /react,so it is of great benifit.