Returning to screens and work after a concussion: a graded re-introduction

You had a concussion. The headache has eased, the worst of the fog has lifted, and now real life is asking for its screens back — the laptop for work, the phone for messages, the reading you fell behind on. You open the laptop, and within twenty minutes your head is pounding, your eyes ache, and the words seem to swim. So you close it, wait a day, try again, and get the same result. It starts to feel like the injury will never let you back to normal.

The short version: the modern approach is not "avoid screens until you feel fine." It is a short period of relative rest — about 24 to 48 hours — followed by a graded, symptom-limited return, where you use screens in manageable blocks just below the level that clearly worsens symptoms, and expand from there. This post explains why screens are disproportionately hard after a concussion, what the evidence actually supports, a practical framework for getting back, and where a vision check and a contrast sensitivity self-track fit in.

Why screens are the hard part

It is worth naming why a laptop is harder than, say, a walk around the block. Concussion is a functional injury to brain networks, and several of the systems it commonly disrupts are exactly the ones a screen leans on.

The first is binocular vision — how your two eyes team up. To read or scroll, your eyes have to converge (turn inward together) and hold that convergence steadily for minutes at a time. After a concussion, convergence insufficiency — difficulty maintaining that inward aim at near distance — is one of the most common findings. So is accommodative dysfunction, a problem with the focusing system that sharpens near targets. When either system is struggling, sustained near work produces headache, eye strain, blur, and the feeling that text is sliding around, even though your distance eye-chart acuity can be a perfect 20/20.

The second is light and motion sensitivity. Screens are bright, they flicker, and they are full of motion — scrolling text, autoplaying video, notifications sliding in. A concussed visual system that is transiently over-sensitive to light and movement finds all of that provoking.

The third is simply cognitive load. Email, work software, and dense reading demand attention and working memory, both of which are often temporarily reduced. The screen is where vision, light sensitivity, and cognition all get taxed at once — which is why it is frequently the last thing to come back.

None of this means the eyes are damaged. It means the coordination is temporarily off. That distinction matters, because coordination problems respond to graded reintroduction and, where needed, targeted rehabilitation.

The advice that changed

For years, the standard prescription after concussion was "cocoon therapy" — a dark, quiet room and near-total rest until symptoms resolved. It was intuitive: the brain is hurt, so let it rest completely. The problem is that the evidence did not support taking it that far. Prolonged strict rest was associated with slower recovery and more mood and deconditioning problems, not faster healing.

The current consensus, reflected in the international Concussion in Sport Group statement, is a brief period of relative rest — on the order of 24 to 48 hours — followed by gradual, symptom-limited resumption of activity (Patricios et al., 2023). "Relative" is the operative word: reduce demanding cognitive and physical activity in the first day or two, then start adding it back in measured steps, using symptoms as your guide rather than waiting for zero symptoms.

Two lines of research fill in the picture.

The early screen window is real. Macnow and colleagues ran a randomized clinical trial of 125 patients aged 12 to 25 seen in an emergency department after concussion (Macnow et al., 2021). Those told to abstain from screens for the first 48 hours had a shorter median symptom duration — about 3.5 days — than those permitted screens as tolerated, who ran about 8 days. The honest reading of this study is narrow but useful: it supports screen restriction in the acute 48-hour window, not a blanket "no screens for weeks." After the early window, avoidance is not the goal; graded return is.

Graded return beats waiting. The clearest parallel comes from the physical-activity side. Leddy and colleagues showed that prescribing sub-symptom-threshold aerobic exercise early after sport-related concussion sped recovery compared with rest (Leddy et al., 2019). The method, built on the Buffalo Concussion Treadmill Test, is instructive: find the heart rate at which symptoms begin to worsen, then exercise at roughly 80% of that threshold, re-checking every week or two and nudging the ceiling up as tolerance grows. The principle transfers directly to screens and cognitive work: find your threshold, work just below it, and expand deliberately.

A graded re-introduction framework

Here is a practical way to apply the sub-threshold idea to screens and work. This is a general framework to adapt with your clinician — not a medical prescription, and not a substitute for the return-to-work or return-to-sport protocol your care team is running.

Step 0 — the early rest window (first 24–48 hours). Keep screens and demanding cognitive work to a minimum. This is the one phase where restriction, not graded exposure, is the plan.

Step 1 — find your threshold. Once you are past the first day or two, do a gentle test. Read or use a screen in a low-stimulation way (larger text, reduced brightness, no autoplaying video) and notice how many minutes pass before symptoms clearly rise — not the first flicker of awareness, but a definite increase. That interval is your starting block length. For many people early on it is short: 5 to 15 minutes.

Step 2 — work in blocks below threshold. Use screens in blocks a little shorter than your threshold, with real breaks between them. If your threshold is 15 minutes, work in 10-minute blocks with a few minutes of eyes-off rest — look at something far away, close your eyes, walk to another room. The break lets the systems reset before they are overloaded.

Step 3 — expand deliberately. Every few days, if the current block length is comfortable, lengthen it modestly. The direction of travel is longer blocks, shorter breaks, brighter and busier screens, more cognitively demanding tasks — one variable at a time, not all at once.

Step 4 — layer difficulty last. Passive reading of large text is easier than composing email; composing email is easier than a spreadsheet full of small numbers; a spreadsheet is easier than a fast-moving video call with screen-sharing. Sequence the type of work from easy to hard as your block tolerance grows.

Some ergonomic changes make each block easier without changing the plan: increase font size, turn down brightness and turn off flicker-inducing settings, reduce on-screen motion, and follow a break rhythm (many people use a 20-minute cue to look far away for 20 seconds). If reading itself feels unstable, that is a signal to get the near-vision system checked, which brings us to the next point.

Note: a graded return is symptom-limited, not symptom-free. Expecting zero symptoms before doing anything tends to prolong recovery; the target is to stay just under the level that clearly flares things, and to expand from there.

Where a vision check fits

If near work is the sticking point — reading, screens, focusing — a comprehensive vision evaluation is often the highest-yield step, because the underlying problems are common and treatable. Master and colleagues examined 100 adolescents with concussion and found that 69% had at least one vision diagnosis: accommodative disorders in 51%, convergence insufficiency in 49%, and saccadic (eye-movement) dysfunction in 29%, with many having more than one (Master et al., 2016). These are not found on a standard distance acuity chart; they require testing of how the eyes focus and team up at near.

The reason this matters for your return plan: if convergence insufficiency is making every reading block miserable, extending block length alone will be a grind. Office-based and home vergence/accommodative therapy has good evidence for convergence insufficiency in this age range, and a neuro-optometric or vision-rehabilitation evaluation can identify what is driving the near-work intolerance. Our companion pieces on what a neuro-optometric rehab appointment actually looks like and vision changes after a concussion go deeper; the week-by-week recovery guide covers the broader timeline.

What a contrast sensitivity self-track can and can't do here

Contrast sensitivity — how faint a pattern you can still see — is one functional axis that can shift after a concussion, and it is easy to track yourself on the same device over time. Used well, it is a modest, honest signal: a baseline you can compare against, and a number to mention if it stays down while you are still symptomatic.

Used badly, it becomes a false oracle. A contrast sensitivity result does not measure "brain recovery," does not clear you for work or sport, and moves for lots of mundane reasons — fatigue, screen brightness, room lighting, whether you are wearing your correction. If you want to fold it into your recovery tracking, take a baseline, retake under similar conditions, and read the trend rather than any single number. Our note on why one test isn't enough explains the variance in more detail.

Note: a contrast sensitivity test is a screening signal of one aspect of visual function. It does not diagnose concussion, measure recovery, or authorize a return to activity. Those decisions belong with the clinician managing your case.

What to do next

• In the first 24–48 hours, keep screens and demanding cognitive work light.
• After that, stop waiting for zero symptoms. Find your threshold, work in blocks below it, and expand deliberately.
• If near work — reading, focusing, screens — is the specific problem, get a comprehensive vision evaluation; convergence and accommodative issues are common after concussion and are treatable.
• Track, don't obsess. A contrast sensitivity self-check on the same device is a between-visit signal, not a verdict.
• Keep your care team in the loop on return-to-work and return-to-sport timing.

If you want a baseline you can revisit as your tolerance improves, you can take a free contrast sensitivity test in your browser. Results stay on your device by default. Retake it under similar conditions and bring any sustained change to the clinician managing your recovery.

References

• Macnow, T., Curran, T., Tolliday, C., Martin, S., McCarthy, M., Ayturk, D., Babu, K. M., & Mannix, R. (2021). Effect of screen time on recovery from concussion: a randomized clinical trial. JAMA Pediatrics, 175(11), 1124–1131. Abstaining from screens for the first 48 hours after concussion was associated with a shorter median symptom duration (3.5 vs 8 days).
• Leddy, J. J., Haider, M. N., Ellis, M. J., Mannix, R., Darling, S. R., Freitas, M. S., Suffoletto, H. N., Leiter, J., Cordingley, D. M., & Willer, B. (2019). Early subthreshold aerobic exercise for sport-related concussion: a randomized clinical trial. JAMA Pediatrics, 173(4), 319–325. Prescribed sub-symptom-threshold aerobic exercise sped recovery relative to rest — the basis for the graded, threshold-based model applied here to screens.
• Master, C. L., Scheiman, M., Gallaway, M., Goodman, A., Robinson, R. L., Master, S. R., & Grady, M. F. (2016). Vision diagnoses are common after concussion in adolescents. Clinical Pediatrics, 55(3), 260–267. Of 100 adolescents with concussion, 69% had at least one vision diagnosis (accommodative 51%, convergence insufficiency 49%, saccadic 29%).
• Patricios, J. S., Schneider, K. J., Dvořák, J., et al. (2023). Consensus statement on concussion in sport: the 6th International Conference on Concussion in Sport, Amsterdam, October 2022. British Journal of Sports Medicine, 57(11), 695–711. Source of the current relative-rest-then-graded-return framework.