How Concussions Affect Vision — A Neuro-Ophthalmologist’s Perspective

How Concussions Affect Vision — A Neuro-Ophthalmologist’s Perspective

Many people are surprised to learn that vision problems are extremely common after a concussion. That’s because vision isn’t just about the eyes; rather, it’s about how the brain controls eye movements, processes visual information, and integrates what we see with balance, attention, and comfort.

As a neuro-ophthalmologist, I often explain it this way:

A concussion doesn’t usually damage the eyes themselves. It disrupts the brain’s control of vision.

In my practice, most concussion-related visual symptoms fall into four main categories. Understanding which one is driving your symptoms is key to recovery.

1. Trouble Reading or Using Screens

Many patients tell me:

• “Words move or blur when I read”

• “I lose my place”

• “I get tired quickly when I’m on the computer”

• “Reading gives me headaches”

This often happens because the brain is struggling to coordinate both eyes together up close. After a concussion, the brain’s ability to smoothly aim and converge the eyes can be disrupted—even if your vision is 20/20.

This is not a glasses problem - it’s a brain-eye coordination problem.

When this issue is identified, it helps explain why reading, schoolwork, or computer use suddenly feels exhausting—even though eye exams may look “normal.”

2. Eye Discomfort, Dryness, and Visual Irritation

Dry eye symptoms often worsen after a concussion, but not for the usual reasons.

After a head injury, the brain’s sensory pathways, especially the trigeminal nerve, which carries pain and irritation signals from the eyes and face, can become overly sensitive. This can lead to:

• Burning or gritty eye sensations

• Eye discomfort that feels out of proportion to exam findings

• Worsening light sensitivity

In other words, the eyes may feel irritated not because they are severely dry, but because the brain is amplifying sensory input.

Addressing this component is important because untreated eye discomfort can make all visual symptoms feel worse.

3. Double Vision

Seeing double after a concussion is always important to evaluate carefully.

Double vision can occur when:

• One eye is not moving in perfect sync with the other

• A cranial nerve that controls eye movement is temporarily affected

• A previously unnoticed eye alignment issue becomes symptomatic

Even subtle misalignment can cause major symptoms—especially in busy visual environments.

As a neuro-ophthalmologist, my role is to determine:

• Whether this is a true neurologic issue

• Whether imaging or further evaluation is needed

• What the expected recovery looks like

Double vision after concussion is a neurologic symptom, not something to ignore or simply “push through.”

4. Light Sensitivity

Light sensitivity is one of the most common—and most distressing—symptoms after concussion.

Patients often describe:

• Pain or pressure with bright light

• Needing to wear sunglasses indoors

• Nausea or dizziness triggered by screens or overhead lighting

This is usually not an eye problem. It’s a brain sensitivity problem.

After a concussion, the pathways that link light input to pain and sensory centers in the brain can become overactive. That’s why even normal light levels can feel overwhelming.

Avoiding light entirely can sometimes make this worse over time, so part of recovery involves gradually restoring tolerance in a thoughtful, guided way.

How I Approach Concussion-Related Vision Problems

As an integrative ophthalmologist and neuro-ophthalmologist, I don’t treat concussion vision symptoms with a one-size-fits-all approach.

Instead, I focus on:

• Identifying which visual systems are affected

• Explaining why symptoms are happening

• Addressing both neurologic and eye-related contributors

• Supporting recovery at the brain and cellular level

Most importantly, I help patients understand that persistent symptoms do not mean permanent damage. They usually mean the brain hasn’t yet been given the right kind of support.

The Bottom Line

If you’ve had a concussion and your vision doesn’t feel right—even if eye exams have been “normal”—you’re not imagining it.

Vision problems after concussion are real, common, and often treatable when approached from a neuro-ophthalmic perspective.

Recovery starts with understanding what’s happening—and knowing that healing is possible.

What’s Coming Next

Because these symptoms are so common—and so misunderstood—I’ll be writing more detailed posts on each of the most frequent concussion-related vision problems:

• Light sensitivity after concussion

• Post-concussion headaches and migraine

• Double vision after head injury

• Managing eye strain

Each of these deserves its own discussion, because the causes, recovery timelines, and treatment approaches are different.

If you or someone you love is recovering from a concussion, stay tuned. We’ll break these down one by one over my next 4 blogs.