Concussion Danger Signs and the Eye-Doctor Call

Which signs need help now?

After a hit to the head, get help now for a new change in sight, a seizure, or if your child is hard to wake. 1 These signs need emergency care rather than a routine eye visit. 1

  • Get help now for double vision. 1
  • Get help now if one pupil gets larger. 1
  • Get help now for a seizure. 1
  • Get help now for new weakness, numbness, poor balance, or trouble with speech or walking. 1
  • Go to the emergency room for a headache that will not stop or for vomiting. 1
  • Get help now if your child is hard to wake or is not fully awake. 1

Why can an eye symptom require emergency triage?

NICE directs a person with a seizure, reduced alertness, or a focal neurologic change after a head injury to emergency care. 1 Describe the head injury and the full symptom pattern to emergency services.

Concussion signs and symptoms may appear hours or days after the injury, and the CDC advises caregivers to monitor for changes and share worsening symptoms with the healthcare provider. 2

How can you plan the next call if there is no danger sign?

If the emergency list does not fit, write down what your child sees or cannot do. The AAP says persistent post-concussion visual symptoms may justify prompt referral to a concussion-experienced specialist. 3 For a persistent visual symptom, contact the clinician directing concussion care for triage. 3 Explain the task affected.

The Short Answer for Parents

When does a visual symptom justify a call?

Children can report blurred vision, light sensitivity, reading difficulty, visual fatigue, headache, or dizziness after concussion. 3 The AAP says prompt specialist referral may help if post-concussion visual symptoms persist. 3 The CDC advises caregivers to share worsening symptoms with the healthcare provider. 2 In the call, explain any repeated task trigger and any effect on reading, class, walking, or another usual activity.

Lead with the head injury, not just “blurry vision.” Say when the injury occurred, whether your child was medically evaluated, which symptoms are present now, and whether any emergency danger sign has appeared. The office can then tell you where and how quickly your child should be seen. For a related symptom pattern, read When to Contact an Eye Doctor about Convergence Excess.

How does an eye visit fit into concussion care?

The AAP says a targeted post-concussion visual assessment should include visual acuity, eye movements, accommodation, and convergence. 3 Share the symptom notes with the clinician directing concussion care and with the eye clinician.

What Post-Concussion Visual Dysfunction Means

What does the phrase cover?

The Living Concussion Guidelines says post-concussion vision disorders may involve acuity, accommodation, eye movements, vergence, visual fields, or photosensitivity. 4 The same guideline notes that prolonged symptoms are nonspecific and may have multiple contributors. 4

A targeted pediatric post-concussion visual assessment includes visual acuity, eye movements, accommodation, and convergence. 3 Leave the tests and their interpretation to a qualified clinician.

What can a parent observe in a younger child?

The AAP notes that younger children may not recognize that they have a vision problem, so asking specifically about visual symptoms can help. 3 Report any new task-linked behavior and quote the child when possible. Describe what you saw without deciding what it proves.

Visual Symptoms and Functional Clues to Record

Blur, double vision, and light sensitivity

Write the child's own words when possible. For blur or double vision, record whether it is constant or comes with reading, looking far away, walking, riding in a car, or changing gaze. Note whether one eye or both seem involved, but write “unsure” if your child cannot tell. For light sensitivity, name the setting instead of rating all light as the same. You can compare this topic with Planning Care after Post-Concussion Visual Dysfunction Is Identified.

Blurred vision, light sensitivity, and difficulty reading are visual complaints identified in the AAP's pediatric concussion guidance. 3 NICE treats a new visual change after head injury as a focal neurologic deficit requiring emergency referral. 1

Reading strain and school changes

Ask what happens during an ordinary reading or screen task. Record when symptoms start, how long they last, whether a break changes them, and whether the child slows or stops. For another care decision in this area, see How Families Can Weigh Saccadic Eye Movement Dysfunction Treatments.

The AAP states that visual fatigue may contribute to headache and may be associated with dizziness after concussion. 3 Record the activity and the symptoms that occur together.

Dizziness, motion sensitivity, and eye or head movement

Describe the trigger precisely: following a moving person, scrolling, turning the head, walking through a busy store, or shifting gaze between targets. Record what happens during usual tasks; there is no need to recreate the problem.

AAP guidance says assessment of smooth pursuit, saccades, and the vestibulo-ocular reflex can help clinicians evaluate symptom provocation related to tracking, reading-like gaze shifts, motion sensitivity, or dizziness. 3

Why a Clinical Evaluation Matters

What else can shape similar complaints?

The Living Concussion Guidelines notes that prolonged symptoms are nonspecific and may have multiple contributors. 4 Use the symptom log to communicate the pattern, then leave interpretation to the clinician.

Tell the clinician about glasses or contact lenses, earlier eye or reading concerns, migraines, medicines, any direct injury to the eye, and symptoms outside vision.

The examination should answer a decision question

AAP guidance says a targeted examination should assess acuity, eye movements, accommodation, and convergence. 3 Ask which findings relate to the task your child cannot do, whether another examination is needed, and who will combine the eye findings with the broader concussion plan.

What Persistent Symptoms Can Mean for Daily Life

How should school impact shape the next call?

The AAP says vision issues after concussion can have a substantial negative impact on a child's functioning at school and in activities. 3 Report the exact demand that is failing, such as sustained reading, copying from the board, screen use, or moving through a visually busy setting. That is more actionable than saying school is “hard.”

AAP guidance lists temporary breaks, audio or large-font printed materials, preferential seating, and preprinted notes as possible visual accommodations within a return-to-learn plan. 3 Ask the concussion clinician and school team which adjustment fits the current problem and when it should be reviewed.

When may persistent symptoms lead to specialist assessment?

The AAP says prompt referral to a concussion-experienced specialist may help when post-concussion visual symptoms persist. 3 The adult Living Concussion Guidelines recommends specialized assessment when visual, vestibular, balance, or coordination symptoms remain functionally limiting beyond one month, but rates that recommendation as Level C evidence. 4

Ask the child's clinician to set the referral timing and explain its purpose.

Why should assessment come before a rehabilitation decision?

The adult Living Concussion Guidelines says functionally limiting visual symptoms remaining beyond one month may require further assessment to identify their causes and direct treatment. 4 That sequence matters. Ask what was found, what functional goal is being addressed, how progress will be measured, and how the plan connects with the rest of concussion care before agreeing to a rehabilitation approach.

When and Whom to Call

Which symptoms belong in emergency care?

NICE directs people with a seizure, reduced consciousness, or a focal neurologic change after head injury to emergency care and advises emergency-department referral for persistent headache or vomiting. 1 The same guideline identifies visual changes as focal neurologic deficits and pupil inequality as neurologic deterioration. 1 These signs belong in emergency care rather than a routine eye-clinic visit. 1

Which non-emergency visual problems justify a call?

The AAP says persistent visual symptoms may justify prompt referral to a concussion-experienced specialist. 3 The CDC advises caregivers to report worsening concussion symptoms to the healthcare provider. 2 When calling, describe blur, light sensitivity, reading trouble, dizziness linked to visual tasks, and the effect on daily function. If you are uncertain about urgency, describe the injury and current symptoms and ask for triage.

AAP guidance supports early referral for further management by a specialist familiar with visual issues after concussion when symptoms persist. 3 Ask the referring clinician which specialist fits the pattern and examination.

Ask who is coordinating the whole plan

Keep one clear point of coordination for school, activity, other symptoms, and referrals. Share the same symptom timeline with each clinician. Ask who will review recommendations together and whom to contact if the pattern changes.

The Living Concussion Guidelines specifically advises neuro-ophthalmology referral for complex post-concussion visual symptoms such as diplopia or impaired vision. 4 Because that guideline addresses adults, let the child's pediatric concussion clinician determine the appropriate specialist and timing.

Questions About Symptoms and the First Call

Does double vision always mean I should call 911?

NICE recommends emergency referral for a new visual change after head injury because it is a focal neurologic deficit. 1 Treat new double vision after the injury as a visual change that belongs in the emergency pathway rather than a routine eye appointment. 1 Tell emergency services when the injury occurred and whether the double vision is new or worsening.

What if the visual symptom began a day or two later?

The CDC says concussion signs and symptoms may take hours or days to appear or be noticed. 2 If the delayed symptom is one of the NICE danger signs above, use the emergency pathway. 1 If no danger sign is present, record when the symptom began and ask the clinician managing the concussion whether an eye evaluation is appropriate.

Can a child have a visual problem without saying “my vision is blurry”?

The AAP notes that younger children may not recognize a vision problem and recommends asking specifically about visual symptoms. 3 Tell the clinician about any new task-linked behavior and quote the child when possible. Report the behavior as an observation, not a diagnosis.

Should I test my child's eyes at home?

This page does not offer a home test to clear a child after a concussion. Record spontaneous symptoms and ordinary task difficulties; there is no need to recreate a problem just to strengthen the record. AAP guidance places acuity, eye-movement, accommodation, convergence, pursuit, saccade, and vestibulo-ocular assessment within a clinician's targeted examination. 3 Ask the office what observations to bring before the visit.

What should I say when I call the eye doctor?

Start with “My child had a concussion” and give the injury date, current symptoms, and prior evaluation. State whether you checked for the emergency danger signs. Then describe the visual task, trigger, duration, one or both eyes, and effect on school or walking. Ask how urgently your child should be seen, which type of clinician is appropriate, and what records to bring.

Questions About the Visit and Next Steps

What might the eye clinician examine?

AAP pediatric guidance includes visual acuity, eye movements, accommodation, convergence, pursuit, saccades, and vestibulo-ocular reflex testing in a targeted post-concussion visual assessment. 3 Ask what each finding means for the problem your child reports and which clinician will interpret it within the broader concussion picture.

Who should evaluate persistent double vision?

The adult Living Concussion Guidelines advises referral to a neuro-ophthalmologist for complex post-concussion visual symptoms including diplopia or impaired vision. 4 For a child, ask the pediatric concussion clinician to choose the appropriate specialist and urgency. NICE recommends emergency referral for a new visual change after head injury. 1

Can school supports begin before the specialist visit?

AAP guidance says visual findings can inform a return-to-learn plan and lists breaks, audio or large-font printed material, preferential seating, and preprinted notes as possible accommodations. 3 Ask the treating clinician and school team for a temporary, specific plan tied to the child's current triggers. Confirm how it will be reviewed as symptoms change.

Does an eye-doctor referral mean my child needs vision therapy?

The Living Concussion Guidelines says persistent, function-limiting symptoms may require further assessment to identify potential causes and direct treatment. 4 Ask for the working diagnosis, functional goal, alternatives, evidence, expected review point, and coordination with the concussion clinician before making a treatment decision.

Questions to Ask Your Doctor

  • Does this symptom pattern require emergency care today?
  • Which visual tasks should we pause, modify, or monitor?
  • What parts of visual function will you assess?
  • Could more than one problem be contributing?
  • Who is coordinating the overall concussion plan?
  • Does my child need ophthalmology, optometry, neuro-ophthalmology, or another specialist?
  • Which school accommodations fit the current findings?
  • What outcome should we track, and when will it be reviewed?
  • Which change should make us call sooner or seek emergency care?

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