If your dog is steady to thrown dummies and has a strong eye contact with you, there is another method you can try. Sit the dog and walk out in front of it, the dog will obviously watch you. Throw the dummy in a direct line away from the dog. As he is already looking at you the retrieve is in his eye line and he will inevitably watch the fall. Walk back to the dog and send him, you can gradually extend the distance.
How did 20th-century gundog trainers manage without a training vest? Practical clothing is a boon for the modern dog trainer, says Felix Petit