The C-Rod as an vision therapy / vision rehabilitation tool was first contemplated in 1983. The idea sat dormant until 2015 when concussion injury started to come to the forefront of public and medical discussion. In 2015 the inventor was studying Visual Evoked Potentials (VEPs) as a means of objectively assessing concussion injury and recovery. As every concussion injury results in oculomotor difficulties, the memory of his 1983 idea triggered the inventor to change from objectively measuring concussion injury and recovery with VEPs to helping persons during their recovery. By chance he shared his idea with a marketing person who encouraged that the C-Rod be brought to the public. The C-Rod is Patent Pending and its many applications are shown on the web page. Your purchasing of the C-Rod which will not only help you, but will also help the inventor in his researching concussion injury.