TrainYourEyes.dk is a danish company specialized in vision training courses. The company's main objective is to research and apply visual training on its customers. The exercises have been developed for these customers with vision problems. Each exercise is divided into many levels and difficulties to ensure maximum effectiveness when training the eyes. During the gameplay, only one eye is used by customers. After the daily training time per eye is passed, the exercises advise customer to change eyes and continues with other eye. Because the defects of eyes are different, customer can choose time length per each eye as advised from the visual practitioner.