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Dr Rangan ChatterjeeDr Rangan Chatterjee

Brain Expert: 'If You Have Brain Fog, Fatigue or Burnout — It Might Be Your Eyes!' | Bryce Appelbaum

When we think about improving our health, we often think about changing our diet, increasing how much we move, improving the quality of our sleep and lowering stress, but how many of us think about ‘working’ on our vision?

Dr. Rangan ChatterjeehostDr. Bryce Appelbaumguest
Sep 9, 20251h 48mWatch on YouTube

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At a glance

WHAT IT’S REALLY ABOUT

How functional vision drives brain health, focus, and daily performance

  1. The conversation distinguishes eyesight (clarity on a chart) from vision (how eyes and brain coordinate to focus, track, converge, and process meaning), arguing many “eye problems” are actually brain-function problems expressed through the eyes.
  2. Functional vision issues may show up as reading avoidance, losing place, skipping lines, headaches, dry/tired eyes, fatigue, brain fog, and even motion sickness due to mismatch between visual and vestibular signals.
  3. They claim modern screen-heavy living drives an evolutionary mismatch that increases myopia and keeps people in a chronic “visual fight-or-flight” state via tunnel vision, dilated pupils, and narrowed attention.
  4. Dr. Chatterjee describes a five-day “vision performance training” intensive that improved his uncorrected acuity from about 20/400 to ~20/70–20/60 and improved binocular performance with under-corrected contacts, which they attribute to better depth perception, peripheral processing, and accommodative flexibility.
  5. The episode offers actionable, low-barrier habits (20/20/20 breaks, near–far focusing, eye stretches, peripheral expansion drills) and critiques reactive eye care and screen-first schooling for ignoring root causes and long-term development.

IDEAS WORTH REMEMBERING

5 ideas

Eyesight is a measurement; vision is a coordinated brain skillset.

They frame 20/20 as only one output, while real-world performance depends on tracking, convergence, focusing flexibility, depth perception, and processing—functions that can be trained rather than only “corrected.”

Reading difficulty often signals eye-teamwork problems, not laziness or low attention.

Losing place, skipping words/lines, rereading for comprehension, and reading-induced fatigue can reflect tracking and focusing instability; people may switch to audiobooks simply because vision is taxing.

Brain fog, fatigue, and burnout can be downstream of visual overwork.

If the visual system is inefficient (especially during prolonged near work), the brain expends extra effort to maintain clarity and single vision, reducing cognitive stamina and productivity across the day.

Motion sickness frequently has a treatable visual component.

When visual input suggests “static” (e.g., staring at a screen as a passenger) while the vestibular system signals motion, the brain struggles to reconcile signals; driving often helps because visual-motor planning and focal/peripheral balance improve.

Screen environments can lock people into chronic tunnel vision and stress physiology.

They connect near-focused screen time to sympathetic activation (pupil dilation and narrowed peripheral awareness), arguing this reduces patience, empathy, and decision quality—effects that may extend beyond eye symptoms into behavior and relationships.

WORDS WORTH SAVING

5 quotes

Vision is the new microbiome. We're gonna look back on this in a few years and realize vision is responsible or at least influences so many aspects of longevity, consciousness, happiness, productivity, critical decision-making, even interpersonal connection, and none of us even had a file on it.

— Dr. Bryce Appelbaum

Eyesight is a symptom. Eyesight is glasses or contacts. Vision is brain, and vision problems are brain problems, and there are so many solutions and fixes out there for vision problems that extend way beyond just getting new glasses or new contacts.

— Dr. Bryce Appelbaum

When we're on screens, our vision, our thinking, our attention become tunneled.

— Dr. Bryce Appelbaum

The human visual system under stress, when the autonomic nervous system is in that fight or flight response, our pupils widen, and we lock in with this tunnel vision.

— Dr. Bryce Appelbaum

Grabbing the over-the-counter readers the first chance you get is the equivalent of your knee hurting and jumping into a wheelchair.

— Dr. Bryce Appelbaum

Read the available transcript
Eyesight vs vision (brain-based visual function)Reading and screen symptoms as vision red flagsMyopia rise, environment, and “visual stress”Motion sickness and vestibular–visual mismatchADD/ADHD, dyslexia, learning labels and vision overlapVision performance training, neuroplasticity, depth perceptionPractical drills: 20/20/20, near–far focus, stretches, peripheral pointing

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SPEAKERS

  • Dr. Rangan Chatterjee

    host

    Medical doctor and host of the 'Dr Rangan Chatterjee' podcast/channel focused on lifestyle medicine and health.

  • Dr. Bryce Appelbaum

    guest

    Functional/behavioral eye doctor specializing in vision performance and vision therapy, including post-concussion/TBI visual rehabilitation.

High quality AI-generated summary created from speaker-labeled transcript.

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