How does concussion affect the visual system?

How does concussion affect the visual system?

Ocular dysfunction that commonly occurs with concussion includes abnormalities of accommodation, convergence, saccades and smooth pursuits. This may cause blurred vision, double vision, ocular pain and difficulty with close work. Symptoms can severely affect daily work, school or play activities.

What are the visual signs of a concussion?


  • Double vision.
  • Poor eye tracking ability.
  • Difficulties with shifting gaze quickly from one point to another.
  • Focusing.
  • Loss of binocular vision (eye alignment).
  • Eye strain.

What type of imaging can show a concussion?

To receive a clearer picture of traumatic brain injury, and where brain damage has occurred in the brain, imaging centers use MRI (Magnetic Resonance Imaging) to now visualize the effects of brain injuries such as concussions and TBIs, when before MRIs only detected abnormal brain activity.

Does looking at a screen Make a concussion worse?

A clinical trial of 125 young adults shows that those who limited screen time for 48 hours immediately after suffering a concussion had a significantly shorter duration of symptoms than those who were permitted screen time.

Can a concussion cause permanent vision problems?

A concussion can cause temporary or long-lasting vision-related symptoms. Sometimes, people think the problem is in their eyes. While some severe injuries could cause permanent damage to the optic nerve, it’s more likely because of a communication problem between the brain and the eyes resulting from the injury.

How long does it take for your vision to improve after a concussion?

Many people experience visual problems during the first 1–2 weeks after a concussion. However, it usually resolves on its own without the need for treatment. If your symptoms continue, contact your primary health care provider.

When is a concussion serious?

Repeated vomiting or nausea, convulsions or seizures (shaking or twitching). Unusual behavior, increased confusion, restlessness, or agitation. Loss of consciousness (passed out/knocked out). Even a brief loss of consciousness should be taken seriously.

Is imaging needed to diagnose concussion?

Thus, a concussion is a clinical diagnosis meaning that there is no current imaging or blood test to diagnose a concussion. Even the most sensitive MRI and CT scanners that are currently available are not able to pick up on the small changes that occur in the brain in concussions.

What is the best scan for concussion?

A CT scan is the test of choice to evaluate for the four types of intracranial hemorrhage (subdural, epidural, intracerebral, or subarachnoid) bleeding in the brain, swelling of the brain during the first 24 to 48 hours after injury, or to detect a skull fracture because it is faster, more cost-effective, and easier to …

Why are you not supposed to look at screens after a concussion?

Rest and quiet can help the brain heal after an injury, he explains. The problem with those screens is that they stimulate the brain with light. Some activities also play loud sounds, which ups the stimulation load even more. Teens spend a lot of time on phones, computers and tablets, as well as in front of the TV.

Why can’t you watch TV after a concussion?

Reading, computer work, playing video games, texting and watching TV can overstimulate your brain, says Dr. Figler. It’s OK to try these activities, but if symptoms occur, you should stop, rest and recover before returning to them.

How is visual field loss treated?

Optical aids such as prism glasses can be used to reduce the apparent visual field loss by shifting visual stimuli from the blind field into the patient’s seeing field. These prisms are fitted to spectacles but need to be restricted to just one half of each of the lenses (typically on the side of the blind field).

What are long term effects of a concussion?

Persistent post-concussive symptoms, also called post-concussion syndrome, occurs when concussion symptoms last beyond the expected recovery period after the initial injury. The usual recovery period is weeks to months. These symptoms may include headaches, dizziness, and problems with concentration and memory.

Is Post Trauma vision syndrome permanent?

Treatment time can range from weeks to more than a year, and the neurological changes are permanent. Treatment for PTVS is commonly coordinated with other professionals. Most eye examinations concentrate on acuity and the physical health of the eye.

What is considered a severe concussion?

Grade 3 Concussion – A Severe Concussion, Lasting Longer with Greater Impact. A Grade 3 Concussion is generally considered the most severe of this type of traumatic brain injury. As in Grade 2 concussions, the patient who suffers a Grade 3 Concussion be unconscious – but for even longer, even more than five minutes.

When should you get a CT scan after a concussion?

Despite its inability to diagnose concussions, doctors still use CT scans to diagnose severe conditions that may happen as a consequence of head trauma. Most emergency department doctors will recommend a CT scan for patients with: Loss of consciousness for more than 5 minutes after the injury.

Should you get a brain scan after a concussion?

Brain scans are usually not helpful for a concussion. An MRI creates clear images of brain tissue. But these scans cannot show if you have a concussion. A concussion is different from a fracture or bleeding. A concussion affects how your brain works, and most people recover within a few weeks.