Concussion or other traumatic brain injury (TBI) can affect a person in many ways, ranging from physical limitations to changes in perception, thinking and neurological processing. Vision problems also are common concussion and TBI symptoms, according to this feature from All About Vision. According to U.S. Centers for Disease Control and Prevention (CDC), TBI or concussion accounted for more than 2.5 million emergency department (ED) visits and 282,000 hospitalizations in 2013. (These statistics include diagnoses of TBI alone or TBI in combination with other injuries.) TBI also contributed to the deaths of nearly 50,000 people that year. Researchers have found that sports and recreational activities account for about 21 percent of all traumatic brain injuries among American children and adolescents.