I am afraid that he need to pause his work as a driver. Glaucoma has various side effects, such as eye aches or pain, halos around lights, headaches and blurred vision, both of which can affect the normal operations of a car, and then increase the possibility of car accidents. What is worse, it can not be easily detected in its preliminary stage. Often, once it occurred , the patients have already lost some of their vision. In general, it must be treated with medicine like some special eyedrops prescribed by doctors. Besides, according to counsels and instructions from the doctors, he can use large-print items and special video systems so that he can deal with the vision reduction. Further, it is essential to develop a healthy life style and keep it in mind that smoking is forbidden.