About the Vision Loss Predictor
Vision changes gradually with age and eye-use habits. Myopia typically progresses fastest in the teens and twenties, slows in the thirties, and largely stabilizes after 40 — when presbyopia (difficulty focusing up close) becomes the primary concern. This tool estimates annual vision decline using age and daily screen time as key inputs.
Research links more than 2 hours of daily near-work (screens, reading) to faster myopia progression, especially in children and young adults. WHO data suggests each additional hour of outdoor activity per day reduces the risk of myopia onset by approximately 2%. The 20-20-20 rule is the simplest evidence-backed strategy: every 20 minutes of screen use, look 20 feet away for 20 seconds.
Results are based on population-average trends and serve as a general reference. Individual variation is significant. Annual eye exams by an optometrist or ophthalmologist are the most reliable way to track and manage changes in vision.
FAQ
Yes, multiple studies have confirmed that outdoor light exposure (not just activity) helps regulate eye growth and slow myopia progression in children and teenagers. At least 1–2 hours of outdoor time daily is recommended for young people.
LASIK corrects current refractive error but does not address the underlying cause of myopia. Without changing screen habits and eye strain patterns, vision may gradually shift again after surgery, though the rate is typically slower.