BHVI has announced a major enhancement to its Myopia Calculator, introducing a new Outdoor Time Filter that enables eye care practitioners to evaluate effects of outdoor time on myopia onset risk and expected rate of progression. The BHVI calculator is developed in partnership with the Shanghai Eye Disease Prevention and Treatment Centre (China), Ulster University (UK), and Linnaeus University (Sweden).
The scientific foundation of BHVI’s modelling draws on peer-reviewed research and developed through international collaboration with the International Myopia Institute (IMI).
Evidence-Based Strategies for Myopia Prevention
Research shows that spending at least two hours outdoors each day is associated with a reduced risk of developing myopia in school-aged children. While gaps remain in defining optimal light parameters (intensity, spectrum, and timing), there is strong consensus supporting increased outdoor activity as an evidence-based strategy to delay myopia onset.1
The BHVI Myopia Calculator is a globally utilised resource, with tens of thousands of users accessing the myopia management tool each month. The calculator provides evidence-based predictions across treatment, prevention and management options, to help eye care practitioners determine the best cause of action for at risk or myopic children and enable informed discussion with parents.
Free to use, the calculator can be accessed at bhvi.org.


