Long hours of reading, screens, and little sleep: medical school is a near-perfect recipe for tired, dry eyes. A meta-analysis published in the journal Vision tried to estimate how common dry eye is among medical students worldwide. The headline number is striking, but how the authors frame it is just as important.
What the researchers did
A team from Peru searched PubMed, Scopus, Web of Science, and EMBASE from January 2000 to March 2026. They included 27 studies with 12,501 medical students and combined the results using standard statistical methods. They also looked at whether estimates differed by how dry eye was diagnosed.
What they found
- The pooled prevalence of dry eye-related outcomes was 47.4%.
- However, the studies were extremely different from one another (a heterogeneity of 99%), so the authors described this as an approximate summary, not a definitive global number.
- Estimates varied by method: self-report, symptom questionnaires, and clinical tests gave different answers.
- Newer studies tended to report higher numbers, but the authors cautioned that this does not prove dry eye is increasing over time.
They called for standardized diagnosis that combines symptoms with signs on the eye surface, and for prevention strategies in medical education.
Why diagnosis method matters
Dry eye is common, but “dry eye” on a questionnaire is not the same as a confirmed diagnosis from an exam. Tired eyes after a long day of studying can come from reduced blinking, uncorrected vision, eye-teaming strain, allergies, or true tear-film disease. Each has a different fix.
Tips for students and anyone with heavy screen loads
- Take regular breaks and look into the distance; blink fully when you do.
- Keep screens slightly below eye level and avoid air vents blowing at your face.
- Wear your current glasses or contact prescription; outdated correction adds strain.
- Use preservative-free artificial tears if needed, and limit contact lens wear on long study days.
- If burning, redness, or blurry vision persists, get an eye exam to find the actual cause.
For more plain-language reading on eye health for students and families, see ineed2020.com.
Source: Global Prevalence of Dry Eye Disease in Medical Students: A Systematic Review and Meta-Analysis (Vision (Basel) (PubMed), 07/23/2026). This article is an educational summary written by Khanna Vision Institute and is not a substitute for medical advice.