Hafez A alhalim. The Effect Vision Exercises on the improvement of Visual Attention Concentration and Serving Performance Accuracy in Tennis. jope [Internet]. 2016 Sep. 28 [cited 2026 Jul. 10];28(3):529-43. Available from: https://www.jcope.uobaghdad.edu.iq/index.php/jcope/article/view/1089