Uncorrected refractive errors cause significant economic implications in both high and low income countries in terms of the loss of potential productivity (Williams et al. (2015)). The prevalence of uncorrected refractive errors is, despite of the available clinical services, still huge; visual impairment is in 42 percent of the cases the result of an uncorrected refractive error worldwide (Williams et al. (2015)). Even in high income countries, this issue remains prevalent. Therefore, the access to the available clinical services has to be simplified. The development of an online refraction method will make a refraction more accessible for patients and can be cost-saving. Clinicians can easily take an online method to places where it's needed for example in low income countries.